Just substitute "4 + h" for "x" under the radical.
So what I really need help with is not finding the slope it's how do I combine the square root into the F(4+H) part of the derivative formula ?
The slope of the tangent line to the graph of at the point is .
The equation of the tangent line to the graph of at is for
Hint: the slope is given by the derivative at , ie.