## anonymous one year ago The limit represents f '(c) for a function f(x) and a number c. Find f(x) and c. lim [7 (sqrt x) -21] / (x-9) x-> 9

1. IrishBoy123

$\large \lim_{{x \to 9}} \frac{7 \sqrt x -21}{x-9}$ hit it with l''Hospital's rule

$\frac{7(\sqrt x - 3)}{(\sqrt x^2 -3^2)}$

3. IrishBoy123

nicer