CALCULUS Branch of mathematics that helps us understand changes between values that are related by a function Estimating Gradient of Curves 2 Estimating Gradient of Curves A tangent is a straight line which touches the curve without crossing it. Note : When we say that the tangent at P does not cross the curve we mean that this is only the case locally (close to the point P). The tangent might also intersect a different part of the curve. 3 4 Gradient using Quadratic Theory 5 Practice Questions 6 Practice Questions : Answers 7 Gradient using Limit Theory 8 Gradient using Limit Theory 9 Differentiation from First Principles 10 Find an expression for the gradient of the chord PQ: Differentiation from First Principles 11 Differentiation from First Principles To denote this idea of the distance h approaching zero, we use lim, which reads as ‘the limit as h tends to 0’. h→0 12 Differentiation from First Principles 13 Differentiation from First Principles 14 Differentiation from First Principles 15 Practice Questions 16 Practice Questions : Answers 17 RULES ON DIFFERENTIATION Note: c represents a constant 18 19 Practice Questions 20 Practice Questions 21 Practice Questions : Answers 22