derivative?

Question

derivative of the function at indicated pt.

f (x) = 5√3x3 + 4x @ (2, 2)

Answer 1

y= 5√(3x^3) + 4x

y'=5 * 9* x^2 / 2√(3x^3) + 4
x=2
y=2

y'=45*4 / (2 *2*√6 +4)
y'=45/√6 + 4

Answer 2

The function does not pass through the given point.