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find the derivative of the following functions from 1st principles 1) f(x)= -2x^3 f'(x)=lim[h:0,(f(x+h)-F(x))/h] f(x)=-2x^3;f(x+h)=-2(x+h)^3 f'(x)=lim[h:0,(-2(x+h)^3-2x^3)/h] =lim[h:0,(-4x^3-6x^2h-6xh^2-2h^2)/h] (not sure if correct) = ????? what next how to get rid of denomenator h?

find the derivative of the following functions from 1st principles 1) f(x)= -2x^3 2)f(x)=3sqrt[x] 3)f(x)=(x+1)^2