Question

Y= f(x) = (-4)^x find f(x) when x = -3

Answer 1

$y=f(x)=(-4)^{x}$

substitute the value of x = -3 to the equation:

$y=f(-3)=(-4)^{-3}=\left(-\dfrac{1}{4}\right)^3=-\dfrac{1^3}{4^3}=-\dfrac{1}{64}$