Derivative Step Through

**jokem** · September 8th 2012, 11:49 PM

Can someone please help step me through the derivative of:

1/sqrt(2+x)

I'm rustier than I thought!

**MarkFL** · September 9th 2012, 12:03 AM

Hint: write the function as:

$f(x)=(x+2)^{\small{\frac{1}{2}}}$

Now use the power rule for differentiation.

**Plato** · September 9th 2012, 02:43 AM

Originally Posted by MarkFL2

Hint: write the function as:

$f(x)=(x+2)^{{\frac{1}{2}}}$
Now use the power rule for differentiation.

It needs to be $f(x)=(x+2)^{{-\frac{1}{2}}}$

**MarkFL** · September 9th 2012, 03:13 AM

D'oh!

Indeed it does!

**jokem** · September 9th 2012, 06:15 AM

Thanks guys for the new perspective! Much easier now =)

Thread: Derivative Step Through