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anonymous
 5 years ago
use the definition of the derivative f'(x)=lim x>delta x of (f(x+delta x)f(x))/delta x of f(x)=2/(x5)
anonymous
 5 years ago
use the definition of the derivative f'(x)=lim x>delta x of (f(x+delta x)f(x))/delta x of f(x)=2/(x5)

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watchmath
 5 years ago
Best ResponseYou've already chosen the best response.0sorry , why I post that on your question? ?

watchmath
 5 years ago
Best ResponseYou've already chosen the best response.0ignore that! there was a but on this software

watchmath
 5 years ago
Best ResponseYou've already chosen the best response.0Then I oblige to answer your question :). For \(f(x)=2/(x5)\). The expression become \[\frac{1}{\Delta x}(2/(x+\Delta x 5)2/(x5))=\frac{2\Delta x}{\Delta x(x5)(x+\Delta x5)}=\frac{2}{(x5)(x+\Delta x5)}\] As \(\Delta x\to 0\) we have \(2/(x5)^2\).

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0for some reason i cant see past the second equals sign... :/

watchmath
 5 years ago
Best ResponseYou've already chosen the best response.0Try to refresh the browser. Press F5.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0nope still the same thing. and i have a mac. so i dont have f5...
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