advertisement

Math 1314 – Test #4 Review Topics – Ch. 6 & 8 15 problems --- All are short answer/partial credit (5 problems from Ch. 6 6 or 8 pts each) (9 problems from Ch. 8 6 or 7 pts each) (1 matching problem with formulas 1 point each) Topics (from Chapter 6): Writing an augmented matrix Perform Gaussian Elimination (ROWOPS) Solve a system using back-substitution How to write non-unique solutions (no solution vs. infinite solutions) Topics (from Chapter 8): Write out the first few terms of a sequence Determine a particular term in an arithmetic sequence Write a formula for the nth term of an arithmetic sequence Find the sum of several terms of an arithmetic sequence Determine a particular term in a geometric sequence Write a formula for the nth term of a geometric sequence Find the sum of several terms of a geometric sequence Calculate a sum (summation notation) Calculate an infinite geometric sum Formulas to “Memorize”: an a1 (n 1)d an a1 r S n 1 (r ≠ 0) a1 1 r where |r| < 1 Sn = Sn = n a1 an 2 a1 1 r n 1 r (r ≠ 0, 1)