Question

Evaluate the expression 4^x/2^x for x=3

Answer 1

Since x = 3, you can substitute/plug in 3 for "x" in the expression:

$\frac{4^x}{2^x}$    Plug in 3 into "x", as x = 3

$\frac{4^3}{2^3}$

$\frac{4*4*4}{2*2*2}= \frac{64}{8}$    Simplify the fraction

8