4.2:DERIVATIVES OF PRODUCTS AND QUOTIENTS Objectives: To use and apply the product and quotient rule for differentiation.

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4.2:DERIVATIVES OF PRODUCTS AND QUOTIENTS Objectives: To use and apply the product and quotient rule for differentiation

THE PRODUCT RULE The derivative of the product of 2 functions is the first function times the derivative of the second, plus the second function times the derivative of the first. Let f(x) = u(x)∙v(x) (u’(x) and v’(x) exist) f’(x) = u(x)∙v’(x) + v(x)∙u’(x) Example: Find f’(x) if f(x) = (2x+3)(x 2 -4) HOW ELSE COULD YOU HAVE DONE THIS?

USING THE PRODUCT RULE, FIND THE DERIVATIVE OF THE FOLLOWING FUNCTIONS

USING THE PRODUCT RULE, FIND THE DERIVATIVE OF THE FOLLOWING FUNCTIONS

QUOTIENT RULE The derivative of a quotient is the denominator times the derivative of the numerator, minus the numerator times the derivative of the denominator, all divided by the square of the denominator. Let f(x) =, v(x) ≠ 0, v’(x) and u’(x) exist f’(x) = Be careful …Use parenthesis when subtracting function in numerator. Be aware of signs!

FIND F’(X) IF F(X) =

Use the quotient rule to find the derivatives

Find the derivative

FIND THE EQUATION FOR THE TANGENT LINE TO THE CURVE AT (1,2)