using the definition of the derivative find:
f(x) = 2 / sqrt(x)
any help is appreciated!
I got stuck right after:
f'(x) = lim (h--> 0) (2/ sqrt(x+h) - 2/ sqrt(x)) / h
I just need to know where to go after this.
Do I find the lcm of sqrt(x+h) and sqrt (x)? What is the lcm and what do I need to multiply both denominators by?