using the first principle of differentiation, find the first derivatives of

f(x) = 3/x^{2}and 1/(sqrt x)^{3 - if using product rule i know, but if using first principle, my ans not the same. Please help me. }

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- Apr 29th 2013, 05:05 AMchoi105First Principle of Derivative and Power Rule
using the first principle of differentiation, find the first derivatives of

f(x) = 3/x^{2}and 1/(sqrt x)^{3 - if using product rule i know, but if using first principle, my ans not the same. Please help me. } - Apr 29th 2013, 05:15 AMa tutorRe: First Principle of Derivative and Power Rule
How far can you get? Do you know what you are trying to find the limit of?

- Apr 29th 2013, 06:17 AMdokrbbRe: First Principle of Derivative and Power Rule
Did you hear about this formula $\displaystyle \frac{dy}{dx} = lim_{h\rightarrow 0} \frac{f(x+h)−f(x)}{h}$

This is called differentiation from first principles, (or the delta method). It gives the instantaneous rate of change of y with respect to x,

dokrbb - Apr 29th 2013, 06:25 AMPlatoRe: First Principle of Derivative and Power Rule
- Apr 29th 2013, 06:27 AMdokrbbRe: First Principle of Derivative and Power Rule