Hello everyone! I just started university calculus and am having problems with a problem (hehe). I would really appreciate some help

PROBLEM:

Let f(x) = √3x

a)Calculate the limits given that x>0

lim h -> 0[f(x+h)-f(x)]/h =lim h-> 0[√3(x+h) - √3x]/h

by multiplying numerator and denominator with f(x+h) + f(x) = √[3(x+h)] + √3x and simplifying.

b)Find the equation for the tangent for the graph f at point (3,3)