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DT.01.5 - Differentiation Techniques: Combining the Differentiation Rules. MCB4U - Santowski. (A) Review – Differentiation Rules. (1) The Constant Rule d/dx (k) = 0 (2) The Constant Multiple Rule d/dx (k × f(x)) = k × f`(x) (3) The Sum and Difference Rules
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DT.01.5 - Differentiation Techniques: Combining the Differentiation Rules MCB4U - Santowski
(A) Review – Differentiation Rules • (1) The Constant Rule • d/dx (k) = 0 • (2) The Constant Multiple Rule • d/dx (k × f(x)) = k × f`(x) • (3) The Sum and Difference Rules • d/dx [f(x) + g(x)] = f`(x) + g`(x) • (4) The Product Rule • d/dx [f(x)×g(x)] = f(x)×g`(x) + g(x)×f`(x) • (5) The Quotient Rule • d/dx [f(x) ÷ g(x)] = f`(x)]×g(x) – g`(x)×f(x) ÷ [g(x)]2 • (6) The Chain Rule • d/dx [f(g(x))] = f`(g(x)) × g`(x)
Find the following: (i) F `(4) if F(x) = f(x) + g(x) (ii) F `(1) if F(x) = fg(x) (iii) F `(-4) if F(x) = f(x) - g(x) (iv) F `(1) if F(x) = f(x) ÷ g(x) (v) F `(-2) if F(x) = g(x) ÷ f(x) (B) Application – Derivative Rules
(f) Find the following: (i) F `(3) if F(x) = 2f(x) - 3g(x) (ii) F `(x) if F(x) = 1 ÷ f(x) (iii) F `(-1) if F(x) = ½ f(x) + ¼g(x) (iv) F `(-2) if F(x) = g(x²) (v) F `(1) if F(x) = g(2x - 3) (vi) F `(-3) if F(x) = f(g(x)) (vii) F `(1) if F(x) = g(f(x)) (B) Application – Derivative Rules
(B) Application – Derivative Rules • (a) Find F `(2) if F(x) = f(x) + g(x) • (b) Find F `(4) if F(x) = fg(x) • (c) Find F `(1) if F(x) = f(x) ÷ g(x) • (d) Find F `(1) if F `(x) = f(x² + 3x)
(B) Application – Derivative Rules • (e) Find F `(5) if F(x) = f(g(x)) • (f) Find F `(3) if F(x) = 2f(x) - 3g(x) • (g) Find F `(1) if F(x) = g(f(x)) • (h) Find F `(2) if F(x) = g(x) ÷ f(x)
(C) Review – Derivatives • (1) Derivatives of Power Functions • If f(x) = xn then f `(x) = nxn-1 • (2) Derivatives of Primary Trigonometric Functions • if f(x) = sin(x) then f `(x) = cos(x) • if f(x) = cos(x) then f `(x) = -sin(x) • if f(x) = tan(x) then f `(x) = sec2(x) = 1/cos2(x)
(D) Examples • ex 1. Find the derivative of • ex 2. Find the derivative of • ‘ f(x) = (x² + 3)4(4x - 5)3
(D) Examples • Find the derivative of the following:
(D) Examples • Find the derivative of the following:
(D) Examples • Find the derivative of the following:
(E) Internet Examples • Visual Calculus - Chain Rule • Chain Rule from UC Davis
(F) Homework • Handouts from Stewart, 1997, Chap 3.5, Q1-10,18-29