Can someone please help step me through the derivative of: 1/sqrt(2+x) I'm rustier than I thought!
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Hint: write the function as: $\displaystyle f(x)=(x+2)^{\small{\frac{1}{2}}}$ Now use the power rule for differentiation.
Originally Posted by MarkFL2 Hint: write the function as: $\displaystyle f(x)=(x+2)^{{\frac{1}{2}}}$ Now use the power rule for differentiation. It needs to be $\displaystyle f(x)=(x+2)^{{-\frac{1}{2}}}$
D'oh! Indeed it does!
Thanks guys for the new perspective! Much easier now =)
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