Hey guys, having a blank moment

Could some one just give me an answer to the the derivative of 4/x^-2, the x to the power -2 has thrown me a bit , longer time since i did this (Thinking) i know it basic stuff , having one of those days

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- June 15th 2012, 07:53 AMJelleyDifferentiation 4/x^-2
Hey guys, having a blank moment

Could some one just give me an answer to the the derivative of 4/x^-2, the x to the power -2 has thrown me a bit , longer time since i did this (Thinking) i know it basic stuff , having one of those days - June 15th 2012, 07:59 AMGokuRe: Differentiation 4/x^-2

Now differentiate... - June 15th 2012, 08:01 AMbiffboyRe: Differentiation 4/x^-2
x^-2=1/x^2 So 4/x^-2= 4x^2 whose derivative=8x

- June 15th 2012, 09:36 AMHallsofIvyRe: Differentiation 4/x^-2
The

**hard way**, using the "quotient rule": (f/g)'= (f'g- fg')/g^2 with f= 4, a constant so f'= 0, and so .

Gosh, wasn't that fun! - June 15th 2012, 12:44 PMrichard1234Re: Differentiation 4/x^-2
Quotient rule, boo...lol