Question 910717
I assume you mean the derivative.
{{{y=4x^2+(1/2)x^2+6}}}
{{{y=(9/2)x^2+6}}}
So then,
{{{dy/dx=2(9/2)x}}}
{{{dy/dx=9x}}}
So at {{{x=1}}}
{{{dy/dx=9}}}