Question

Just answer. Just answer. @Mathematics

Answer 1

\[\frac{dy}{dx}=\frac{x}{\sqrt{x^2+7}}\]

Answer 2

how should i write that on wolf?

Answer 3

like this:

Answer 4

well first you have to understand that if
\[u=x^2+7\]and
\[y=\sqrt{u}\]then
\[y=\sqrt{x^2+7}\] so you could write that in, but you can do this in your head

Answer 5

somewhere in all this mess ts the derivative
http://www.wolframalpha.com/input/?i=sqrt%28x%5E2%2B7%29

Answer 6

the next one just asks for
\[\frac{dy}{du}\] so if
\[y=u^{53}\] then
\[\frac{dy}{du}=53u^{52}\]