Question

If $4^x$ = 64, then

• A. Positive
• B. Negative
• C. Zero
• D. Fractional number

Answer 1

Answer: (A), (B), (C)

The correct options are
A

Positive

B

Negative

C

Zero

$4^x=64$
$\Rightarrow 4^x$=$4^3$ (as 64 is $4^3$ )
$\Rightarrow x=3(\because a^m=a^{n}ifandonlyifm=nfora\ne 0,1,-1)$
Since $x=3$, $2^{2x}$ = 64 , and 2x =6