Hi all

I hve two Q I want the explaine how to solve

Q1 A) Find an equation for tangent to curve y = X^3 - 4X + 1 at the point (2,1)

(b ) What is the range of values of the curve's slope

Number ( A ) I can solve it but ( B) I face problem to solve

Q 2 derivative y = x - 3root X

please I want the explaine how to solve How to solve each one .