Question

f(x) = x³ -1/x³ then f(x) + f(1/x) = ?​

Answer 1

Answer:

$f(x) = {x}^{3} - \frac{1}{ {x}^{3} } \\ now \: f( \frac{1}{x} ) = \frac{1}{ {x}^{3} } - {x}^{3} \\ therefore \: f(x) + f( \frac{1}{x} ) = {x}^{3} - \frac{1}{ {x}^{3} } + \frac{1}{ {x}^{3} } - {x}^{3} \\ = 0$