MSA Faculty of Engineering Sheet ( 1 ) Functions, Limits & Continuity Eng. Math. I ( MAT 151 ) 1 - Solve the following inequalities: a) d) 4 6 x 11 g) x( x 3) 0 b) e) 25 x 2 0 h) 8 x 2 2 x 15 9 x 5 c) f) 6 5x x 2 i) 6 5 x 9 4 x3 6 x 2 2x 8 0 2 - Find the domain and the range of the following functions: a) f ( x) 9 x b) f ( x) 1 / d) f ( x) 4 x e) f ( x) g) f ( x) x2 3 h) f ( x) c) f ( x) x 2 f) f ( x) 3 x x6 i) f ( x) 4 x 2 x 2 5x 6 4 x x 2 3 – Identify the following functions: y 5x 8 a) y5 x d) x 1 f ( x) 3 x 1 e) f ( y) g ( x) 21/ x h) g ( y) log 5 ( y 1/ y) b) y3 y 4 g) i) j) g (u) 5 u 8 sin(2u) u 5u (u 1) /(u 2) y ( x 2 1) /( x 6) k) m) y log 2 ( y 1 4 y) n) y 3 x2 x4 y 7 3 x x c) y 2 x 3 5x 8 f) f ( z) 5 tan(3z / 4) l) y 2 x 3 5x 8 o) f ( z) 2 sin( z) cos(3z) 4 - Sketch the original and shifted graphs together labeling each graph with its equation: a) y x 3 , right 2, down 1 b) y 2 x 1 c) y 3 x 2 1 d) y x , left 1, up 2 e) y 1 ( x 2) 2 f) y 3 x 1 2 g) y x 2 , right 2, down 1 h) y 2 3 x 1 i) y x 2 1 5 - Graph the following functions ( labeling each step with its equation ): a) d) y x2 3 b) e) y (1 x) 2 3 y 3 2 x y 2 x 3 c) f) y 2x 1 y 3 x 2 1 6 – Which of the following functions are even, odd , or neither? , and then discuss the symmetry of their graphs(if it exist): a) d) g) f ( x) x 4 3 x 2 5 y 3x x 5 y x 2 ( x 2x3 ) b) e) h) g ( x) x 3 5x 1 / x y x2 x y (1 x) /(1 x) - 1 / 11 - c) f) i) h( x) 2 x 3 5x 8 y 3x 2 x 6 5 f ( x) x / ( x 2 1) 7 - Study the domains of the following functions and the symmetry of their graphs: a) f ( x) e) g ( x) x 3 3x 14 x x 2 b) g ( x) x 3 x x 2 4 d) f ( x) x / x f) f ( x) 3x 2 x 1 g) g ( x) 3 x 8 - Sketch each equation, and then discuss the following if it represents a function: i) Domain and range. ii) Increasing and decreasing intervals. iii) Whether it is one-to-one or not?. iv) Whether it is even, odd or neither?. a) y 2x 3 b) y x c) x y2 3 d) y x 1 2 e) y x 3 2 f) y x /( x 1) 2 g) y x2 1 2 x 1 f ( x) x 2 x 4 h) y 2 / x3 x0 i) k) j) 0x2 2 x5 0.5 x 1 f ( x) x 2 8 x 2 f ( x) x 3 x 3 x 1 x 1 x 1 0 x 1 1 x 2 2 x5 9 - Find the domain of the following functions: x4 5 x 5x 6 a) f ( x) c) f ( x) x 2 e) g ( x) x 6 1 b) g ( x) 4x x 1 d) g ( x) 4 3x x 2 x4 x2 4 f) f ( x) x 5 2 x2 4 5 x x x 2 2 x 3 10 - Evaluate the composite functions ( f g )( x) & g f ( x) and their domains when: a) f ( x) x 1 c) f ( x) x 1 , , e) f ( x) x 2 , b) f ( x) x 2 d) f ( x) x 1 g ( x) x g ( x) x 2 1 g ( x) x 1 f) f ( x) x 2 , , , g ( x) x 1 g ( x) 1 / x g ( x) x 1 11 - Study the domain and the symmetry for each of the following functions: a) f ( x) c) f ( x) e) f ( x) 1 cos( x) 1 cos( x) tan x 3 csc 2 x 4 1 sec( x) sin( x) tan( x) x cos( x) sin( x) 2 cos( x) x2 1 b) f ( x) d) f ( x) 3 tan(2 x) 1 2 cos( x) f) f ( x) - 2 / 11 - x sin( x) cos( x) x 2 2 1 cos( x) x 4 12 - Find the inverse function f 1 (x) ( if exists) for the following functions, then find : D( f 1 ) and R( f 1 ) f ( x) 3 x 2 x f ( x) , x 1 x 1 a) d) b) f ( x) x 2 1 , x 0 c) f ( x) x 3 8 e) f ( x) x 4 f) f ( x) 3 x 1 13 - Graph the following functions ( labeling each step with its equation ): f ( x) 3 e x 1 a) d) g ( x) 1 / ln( x 2) g ( x) 1 ln( x 2) b) e) f ( x) 1 e x 2 f ( x) 2 1 / e x c) f) g ( x) 1 / ln( x 3) 14 – Find the domain and the range of the following functions: a) f ( x) x e x1 b) g ( x) ( x 2 4) / ln(4 x 2 ) c) f ( x) e x /( x 2) d) g ( x) x 1 ln x e) f ( x) e x 2 x 4 f) g ( x) 4 x 2 / ln x c) lim 15 - Evaluate the following limits: a) lim x 2 16 - If lim ( x 2)( x 1) b) x 7 3 x 1 f ( x) 3 , x 2 lim x 3 lim f ( x) 2 x 5 and lim ( x b) x 2 c) lim x 5 d) 1) f ( x) g ( x) cos( x 2) lim sin e) f ( x) 0.4 x x g ( x )6 lim x f ( x)( x 1) x 2 f) 2 f ( x) 3 g ( x) lim f ( x) g ( x) 3 x 2 17 - Given the following graph, compute each of the following: a) f (4) , f (1) , f (6) b) lim f ( x) , lim f ( x) x 4 c) lim x f ( x) x6 d) x5 2 find the following limits: x 5 f ( x) 2 x 2 x x 5 x2 x 2 x 2 2 3 x 3 lim g ( x) 4 , lim f ( x) 2 g ( x) x a) x 2 15 lim x1 x 2 f ( x) x 6 - 3 / 11 - and lim x6 f ( x) 18 - For each of the following functions, find the limit of f (x) at the given points. 2 x 1 a) f ( x) x 3 2 x 3 x 1 , x 1 at x = -1, 0, 1 1 x x0 2 x 3 sin( x) 2 b) f ( x) x 0 x2 x 3 x2 , at x = 0, 1, 2 19 - Find the values of a and b so that each of the following functions has a limit everywhere: a 3 cos( x) a) f ( x) x 2 b a x x b b) f ( x) x 3 a ax b x0 0 x4 , 4x x 1 1 x 3 x3 20 - Use the sandwich theorem to: a) Find i) ii) lim f ( x) lim 3 f ( x) 2 4 f ( x) 5 , x 3 cos x f ( x) x 2 If b) Prove that lim x i) iii) x x c) Find x f ( x) lim lim 1 cos x 2 0 2 x ii) f ( x) lim x f ( x) iii) x 0 x0 x0 lim x4 , ( f ( x)) 2 4 5 x 2 f ( x) 5 x 2 If 21 - Find the following limits: a) lim x 2 d) lim x 2 3x 2 x3 2 x 2 x2 x2 5 3 x 2 g) lim x 0 j) lim x 0 x2 8 3 lim x 1 x 1 4 x 81 e) lim 2 x 3 x 9 b) x x h) lim x 2 x 2 4 x sin( x) 2x tan (5 x) m) lim 2 2 x 0 3 x 2 sin ( x) lim x 3 k) sin 2 x lim x 3 tan(x) sin x 9 x3 2 2x 7x 1 3 2x 2 4 lim x x lim x2 1 2x 4 x 9 f) x 1 i) x 2 l) x 0 n) lim x q) lim x 0 1 x sin x (1 cos( x)) x sin( x) t) lim x xx 3x 4 - 4 / 11 - x csc( 2 x) lim 3 cos(5x) x0 sin 2 (5 x) sin(5 x 2 ) o) lim x2 x 0 r) lim x 0 1 3 s) lim x 3 x9 x2 x 2 x2 x lim 2 2 p) x 1 2 x 42 c) u) sin(5 x) cos(5 x) 3 tan(7 x) x 6 tan( x) lim x x2 x x2 x 22 - Find the points of discontinuity of the following functions: a) f ( x) sec x 5 sin x x2 4 x e) f ( x) sin( x) x sin x x 2 cos x 1 b) f ( x) d) f ( x) 3 x sec x 5sin x x 1 x 1 x2 9 1 f) f ( x) tan(x) x2 c) f ( x) 23 - Discuss the continuity of the following function at the given points: x 2 1 2 x a) f ( x) 1 2 x 4 0 x 1 x c) f ( x) 5 sin x 5 x 1 x 0 tan x 2 0 x 1 x b) f ( x) 0.5 x 1 at x 0,1,2 x 2 1 x 2 2 x3 0 sin x x0 d) f ( x) x at x 0 x0 1 1 x 0 0 x 1 x 1 at x 0,1,2 1 x 2 2 x3 x0 x0 at x 0 24 - Find the values of a, b, and c at which the following functions are continuous everywhere. a) c) x2 1 x3 f ( x) x3 2ax sin ax x f ( x) 5 x 2 c x bx 12 x3 b) x0 0 x3 3 x Assignments ( Sheets ) Assignment 1 1( g → i ), 2( h , i), 3( m → o), 4( g → i ), 5( e , f ), 6( g → h ), 7( e , f ), 8( g , h, k ), 9( e , f ), 10( e , f ) Assignments 2 11( e , f ), 12( e , f ), 13( e , f ), 14( e , f ) 15(c), 16(c, f), 18(b), 20( c ), 22(e, f), 23(d), 24(b) - 5 / 11 - x f ( x) 2 bx x 2 x 2 MSA Faculty of Engineering Sheet ( 2 ) Differentiation Eng. Math. I ( MAT 151 ) 1 – Find the equations of the tangents to the following functions at x = 0 (if they exist): a) 1 x f ( x) 2 1 x x c) e) x0 b) f ( x) x f ( x) 1 x d) f ( x) f ( x) f) f ( x) cos x 0x x 4 x 2 - Find the first derivative from the first principles (Definition): a) b) c) f ( x) 4 3 x2 1 f ( x) 3x 1 d) f ( x) sin( x) e) f ( x) cos( x) f ( x) 2 x 2 3 f) f ( x) 1 x 1 3 - Discuss the differentiability of the following functions at the given points: a) b) c) d) x2 x f ( x) sin x cos x 1 tan x x cos x g ( x) 2 x tan x 2x 3 cos x f ( x) 2 x 2 x 2 2x 1 g ( x) 1 2 tan x x0 0 x /4 at x0 and x / 4 at x0 and x at x0 at x0 /4 x x0 0 x x x0 0x x0 0 x 4 – Find y for the following functions: a) y x 3 x 5 d) y 3x 2 4 x g) x 3 y 2x 5 7 x 1 5 b) y x 6 4 x 2 5 3x 2 8 c) y x5 1 2x 3 6 e) y x 4 8x 4 x 2 48x f) y 2x 7 6 x3 3 16 h) y 7 x 2 x 2 4 x 2 3x 8 i) y x9 4 4x 3 7 x 1 x 5 – Find y for the following functions: a) y x sin x sec x cot x x b) y - 6 / 11 - sin(3x) cot(3x) 3x csc x cos(3x) c) y 1 cos( x) 1 cos( x) 6 - Find y for the following functions: b) y cot x sin x 2 c) y tan 4 x sec(3x 2 5) d) y 3x 3 6 6 x 2 5x 2 e) y sec( x sin( x 2 )) f) y x tan 2 x sin 5x g) y (7 x 4) 5 sin 5 (3x 4 2 x) h) y tan(3x 2 ) sec(3x 2 ) i) y 3 sin(cos( x)) csc( x) 1 a) y 5x 4 4 x 3 3x 2 6 4 3 7 - Find y for the following functions: a) x y 2 x 2 sin y 3x 5 y 3 6 c) x x2 2y 1 b) x 2 y tan(x y) sin( x y) 2 x d) cot( y 3) sin 2 tan(x y) f) x 3 y 3 x y 2 3( x y) 2 sec(1.5) e) x 3 y 2 cos(4 x y) 2 8 - Find y for the following functions: a) b) c) y cos(4 5) 2 t 2 1 t 2 1 y 5t 2 2t 1 y & x sec 2 ( 2 1) & x t 3 5t 3 & x sin(t ) 9 – Find y for the following functions: a) c) d) f) h) y 2 x 3x 2 4 3 4 y 2 2 3 1 cos( x) y 1 cos( x) b) x y tan(x y) & y cot 7 sin x y sin( x cos( x 2 ) ) x cos sin(3x) cot(3x) 5x 2 cos(3x) e) y g) i) x y 3 x sin y 3 y 5x 3 2 x 3 y 3 x y 3( x y) 2 1 2 10 - Find y in a simple form ( if possible ): a) ye x x tan x 3 1 x x b) y ln(2 ln x 2 ) ln 2 ( x cot 2 x) e) y ln 4 x 2 1 4 x tan 2 x 2 d) ye g) y e x sec 3 x h) y ln x 3 sin 3x 1 4 x csc 5x - 7 / 11 - c) y ln e x f) y ln i) y e ln(x 6 sin 2 x x2 5 3x 4 6 sin 2 x ) 11 - Find y in a simple form ( if possible ): x 3 2 x x sin x 2 a) y4 c) e) g) y 10 x x10 10 x e 2 x 5 3x 3 y xx i) sin xcos y sin y cos x 3 x 3 e 2 x 1 sec 2 y k) y tan x 3x 2 1 2/5 x x x 33 / 4 2 x 13 / 5 sin b) y d) f) h) y x x e x1 y y1 x 1 j) y 5 6 x 7 x 8x 9 l) sin xcos y sin y cos x 3 4 x 2 1 2/5 x ex y ln sin x sec x ln(e ) sec2 x 12 - Prove that: a) b) c) y y 2 1 0 y e 2 y x y xy y 0 2 y ln(sin x cos x) If If If y ln(cos x) y cos(ln x) sin(ln x) 13 - Evaluate the following expressions: a) x sec tan 1 2 b) x cos csc 1 2 x 9 b) y tan 2 sec 1 x 14 - Find y in a simple form: a) y sin 2 cot 1 x c) x sin tan 1 2 1 x c) y cos 2 cos 1 1 x 15 - Find y in a simple form( if possible ): a) y sin 1 x sin x 1 sin x b) y tan 1 cos x 2 c) y sin 1 sin x d) y cos 1 (2 x) cos(3x) e) y cot( x sin 1 x) f) tan y x 2 x g) y x 1 x 2 sin 1 x h) y tan 1 1 cos x 1 cos x i) x 1 y cos 1 x 1 1 3 3 16 - Prove that: a) y 0 if b) y 0 if c) y 3 y 1 0 if d) y 4 x cos 1 x if e) f ( x) g ( x) if c) 2 yy 1 if y sin(cos 1 x) 1 x2 . 2 x 1 1 x y tan 1 tan 2 x . 1 x t t x cos y sin , 1 t 1 t y sin 1 ( x) 2 x 2 cos 1 ( x) x 1 x 2 . x 1 1 f ( x) sin 1 x. , g ( x) 2 tan x 1 y sin 1 ln e sin x . - 8 / 11 - 17 - Prove that: a) cosh 2 x sinh 2 x 1 b) c) sinh 1 x ln( x x 2 1) d) e) cosh(a ln x) g) sinh(2 x) 2 sinh( x) cosh( x) 1 a x x a 2 f) h) cosh 2 x sinh 2 x cosh(2 x) 1 1 x tanh 1 x ln x 1 2 1 x 1 1 x2 sec h 1 x ln 0 x 1 x n nx cosh x sinh x e 18 - Find y in a simple form ( if possible ): y sinh( x 3 7 x 9) e x tanh(5x 1) a) c) e) g) ln(sinh y) tanh 1 x sin 1 y b) d) f) h) i) tanh 1 y tan 1 x y 2 j) y sinh 1 x sin x 1 sinh x 1 1 y cosh ( x ) / e , x 1 4 x k) y csc h 1 ( x) csc h( x) csc( x) m) y sinh 1 (e x sin x) l) n) y sec h( x 2 3x 4 ) / x 1 y x sinh (3x) 2 y ln(tanh 1 x) , 0 x 1 y coth sin x sin 1 x cosh x 1 y sec 1 cosh x 1 y tan 1 x coshx x e t cos t , y e t sin t 19 - Find the domain of each of the following functions: a) f ( x) 3sin 1 ( x 5) g) tanh 1 (2 x 5) x 1 f ( g ( x)) and g ( f ( x)) h) f ( g ( x)) and g ( f ( x)) c) f ( x) b) f ( x) ln(e x 1) d) f ( x) f) f ( x) cosh 1 (2 x 3) if tan 1 ( x 3 5) ln( x 2 9) e) f ( x ) x2 9 x 2 16 f ( x) ln( x 2) and g ( x) cos x if f ( x) sin 1 ( x) and g ( x) e x Assignments ( Tomas' Calculus ) Assignment # 3 1(e, f), 2(c, f), 3( c, d), 4(g→i), 5(c), 17(g, h) , 18(k→n), 19(f, e) - 9 / 11 - MSA Faculty of Engineering Sheet ( 3 ) Applications & Partial Differentiation Eng. Math. I ( MAT 151 ) [ 1 ] Use L' Hopital rule to evaluate the following limits: (i) lim x 3 (iii) x2 x 6 2 x 4 x 21 (ii) lim y sin(13 t ) lim tan(91t ) 32 y 5 1 3 8 y 1 1 2 3 w 5 tan(3 w) lim 11w sin(5 w) (iv) t 0 w0 [ 2 ] Evaluate the following limits: (i) lim x 1 (iii) 2 2x x 33 1 x2 lim x 1 sin x 1 sin( x) 1 sin( x) (iv) lim x x 0 1 cos x (vi) lim x2 x 0 1 sin ( 2 x ) (viii) lim 1 x 0 tan ( 3 x ) (ii) tan x sec x 1 lim tan x sec x 1 x 0 (v) lim x 0 (vii) lim x 0 1 cos x 4 2 x 2x 1 3e 4 x 4 e3 x x sin( x) [ 3 ] Evaluate the following limits: (i) lim x (iii) lim x 0 3 x2 4 2 5 x x 1 ln(tan 2 x) ln(tan 3x) tan x lim 1 sec x (ii) x / 2 (iv) lim x [ 4 ] Evaluate the following limits: (i) lim x ex 2 x (iii) lim x e 1/ x (v) x 0 (iv) ln x lim lim sin x x (vi) ( 2 x ) sec( x) sec x tan x lim (viii) lim e x 0 x 0 (vii) 2 x ( / 2) 1 1 lim x (ii) 1 x x3 2 x e x 1 1 1 x lim ln( x) ln(sin x) x 0 x / 2 [ 5 ] Evaluate the following limits: (i) lim x (iv) x 5 1 x (ii) cot x x 0 tan x lim cos x x / 2 lim 1 3 x (v) 1 sin x lim x x 0 - 10 / 11 - (iii) lim x sin x x 0 (vi) lim cos x 1/ x (vii) x 0 (ix) lim x lim 1 x ln x (viii) (x) x lim ln x x 1 x 0 x 0 1 / ln x lim e x 1/ x x [ 6 ] Find the first 3 nonzero terms in the Taylor series at x a in the following cases: a) , f ( x) sin x a /2 2 f ( x) cosh 3 x , b) a 1 x c) , f ( x) x e a 1/ 2 x d) f ( x) e ln x , a 1. [ 7 ] Find the first 4 nonzero terms in the Maclaurin series in the following cases: a) b) f ( x) cos x f ( x) sinh 1 x c) d) f ( x) e x /(1 x) f ( x) ( x 1) ln( x 2) [ 8 ] Find the first 3 nonzero terms in the Taylor series at x a in the following cases: a) , b) f ( x) sin( x / 4) , f ( x) cos x a 0. a 1. x 1 c) d) f ( x) ( x 1) tan x , f ( x) e ln( x 2) , a 1/ 2 . a 0. [ 9 ] Find the first 3 nonzero terms in the Taylor series at x a in the following cases: a) , b) f ( x) (tan 1 x) 2 f ( x) cos x sin x , a 0. a 3. c) f ( x) e x 1 1 x , a 1/ 2 . d) f ( x) ln(1 x) 1 x [ 10 ] Find the first partial derivatives the following cases: f ( x, y) tan 1 ( y / x ) f ( x, y) e x y ln( y ) (i) (ii) (iii) f ( x, y) x e x y sin x (iv) f ( x, y, z) tanh( x 2 y 3 z ) [ 11 ] Find all the second partial derivatives the following cases: (i) (ii) g ( x, y) ln( x y) f ( x, y) x e y y 5 [ 12 ] Verify that: f ( x, y) e x x ln( y ) y ln( x ) (i) if fx y fyx (ii) [ 13 ] Find (i) (ii) (iii) gxz gz x if g ( x, y, z ) x2 y2 z 2 w / u and w / v in the following cases: y sin u , w ln( x 2 y 2 z 2 ) , x cos u , w 4e ln y , x x ln(u cos v) , w x y y z z x, x uv, z4 u y u sin v y u v , z uv Assignment # 4 ( Sheet 3 ) 1( i, iv ), 2( i, iv, vii, viii ), 3( iii, iv ), 4( iii, vi, vii ), 5( i, iii, v, vii, ix ), 9 10( i, ii ), 11( ii ), 12( i ), 13( i, iii ) - 11 / 11 - , a 0. MSA Faculty of Engineering Sheet ( 4 ) Find the Maclaurin series for a) b) c) d) 𝑓(𝑥 ) = ln(𝑥 + 1) 𝑓(𝑥) = sin(2𝑥) 𝑓(𝑥 ) = 𝑒 3𝑥 𝑓(𝑥 ) = 𝑥𝑒 2𝑥 2-Find the Taylor's series for 𝑓(𝑥 ) = sin(𝜋𝑥) and 𝑎 = 1 3- Find the absolute maximum and minimum values of a) 𝑓(𝑥 ) = 2𝑥 2 − 6𝑥 over the internal [0,4] b) 𝑓(𝑥 ) = 3𝑥(𝑥 − 4)1/3 over the internal [-5,4] - 12 / 11 - Eng. Math. I ( MAT 151 )