Unformatted text preview: ] = f(x)g'(x) + g(x)f'(x) The Quotient Rule The quotient f/g , of two differentiable functions, f and g , is itself differentiable at all values of x for which g(x) does not = 0. Moreover, the derivative of f/g is given by the denominator times the derivative of the numerator minus the numerator times the derivative of the denominator divided by the square of the denominator. d/dx[ f(x)/g(x) ] = (g(x)f'(x)  f(x)g'(x)) / [g(x)] 2 g(x) does not = 0 The Chain Rule If y = f(u) is a differentiable function of u and u = g(x) is a differentiable function of x , then y = f(g(x)) is a differentiable function of x and d/dx[ f(g(x)) ] = f'(g(x))g'(x) The General Power Rule If y = [ u(x) ] n , where u is a differentiable function of x and n is a rational number, then d/dx = [ u n ] = nu n1 u' ....
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 Fall '08
 Julies
 Derivative, differentiable function, differentiable functions

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