3^m+3^ -3 =3^5 m is equal to: - Vidyadip

MCQ

$3^m+3^{-3}=3^5 \Rightarrow m$ is equal to:

A
$1$
✓
$2$
C
$3$
D
$4$

✓

Answer

Correct option: B.

$2$

B. $2$
Solution:
$3^m+3^{-3}=3^5$
$\Rightarrow 3^{m+3}=3^5 $
$\Rightarrow m+3=5 $
$\Rightarrow m=2$

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