Question

If 2^x = y, express the following in terms of y.
$8( {4}^{x - 2} )$

Answer 1

Step-by-step explanation:

If 2^x =y then 8(4^(x-2))=y²/2

Used formulae:-

1.a^m/a^n=a^(m-n)

2.(a^m)^n=a^mn