Question

PLEASE SOLVE WILL GIVE MEDAL
Find the derivative of f(x) = -3/x at x=-4

Answer 1

\[\frac{ d }{ dx } \frac{ 1 }{ x } \implies \frac{ d }{ dx } x^{-1}\]
\[\frac{ d }{ dx } x^n \implies nx^{n-1}\]

Answer 2

I don't understand what that means @iambatman

Answer 3

No worries, probably the notation :P, we'll use f'(x), do you know the derivative of 1/x?

Answer 4

\[f(x) = x^n, f'(x) = nx^n\]

Answer 5

no I don't know

Answer 6

Do you know what a derivative is?

Answer 7

no not really

Answer 8

@faariat What's the limit definition of a derivative?

Answer 9

\[f'(a) = \lim_{h \rightarrow 0} \frac{ f(a+h)-f(a) }{ h }\] this ring a bell?