Let f( x) = Vx. (a) Simplify (15 + h) - f(15) h Algebraically simplify your answer until you have cancelled out the factor of h in the denominator. 1 V15 +h + v15 (b) Evaluate lim f(15 + h) - f(15) h -0 h If an answer does not exist, enter DNE. DNE X (c) Determine the equation of the line tangent to y = f(x) at x = 15. y = 0.129x + 1.936 X