The function \(h\) is defined by \(h(x) = \frac{10x^3}{x^2 - 9k^2} - …

Question

Prompt

The function

h

is defined by

h (x) = \frac{10 x ^{3}}{x ^{2} - 9 k ^{2}} - \frac{5 x}{x + 3 k}

, where

k

is a positive constant. What is the value of

h (\frac{21 k}{5})