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Mathematics 40 Online
OpenStudy (tad1):

The derivative of an even function is an odd function. The derivative of an odd function is an even function. Prove the results by from the limit definition of the derivative: Lim( as x approaches 0) [f(x - f(a)] / (x - a )

OpenStudy (anonymous):

this is trivial if you get to use the chain rule. but you must use definition yes?

OpenStudy (anonymous):

f(x)'=lim f(x)-f(a)/(x-a) if it is an even function than we know that f(x)=f(-x) f(-x)'=lim f(x)-f(a)/(-x-a)=-f(x)'

OpenStudy (anonymous):

same way if it is odd

OpenStudy (anonymous):

so we assume f is odd and prove f' is even in other word we have to show if \[f(-a)=-f(a)\] then \[f'(-a)=f'(a)\]

OpenStudy (anonymous):

oh what andras said!

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