Hi,

I'm having a difficulity with my homework, how do I:

Differentiate: 2/x^2

Differentiate: √x^5

Expand: (x+ 2/x)^2

Can anybody help please?

Many Thanks

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- Sep 7th 2007, 07:08 AMHobbsdifferenciate
Hi,

I'm having a difficulity with my homework, how do I:

Differentiate: 2/x^2

Differentiate: √x^5

Expand: (x+ 2/x)^2

Can anybody help please?

Many Thanks - Sep 7th 2007, 07:23 AMred_dog
$\displaystyle \displaystyle \frac{2}{x^2}=2x^{-2}$

$\displaystyle \displaystyle\sqrt{x^5}=x^{\frac{5}{2}}$

$\displaystyle \displaystyle \left(x+\frac{2}{x}\right)^2=x^2+4+4x^{-2}$

In all cases use $\displaystyle (x^a)'=ax^{a-1}$ - Sep 7th 2007, 08:56 AMHobbs
Thats brilliant, Thankyou very much :D