Question

If y=3/4+x^2 then dy/dx=

Answer 1

\(2x\) ?

Answer 2

unless you mean \(y=\frac{3}{4+x^2}\) in which case use
\[\frac{d}{dx}[\frac{1}{f}]=-\frac{f'}{f^2}\] to get
\[\frac{-6x}{(4+x^2)^2}\]

Answer 3

OK