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Exponents and Powers — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSExponents and Powers1 Mark
MCQ
The value of $(-2)^{2\times 3-1}$ is:
  • A
    $32$
     
  • B
    $64$
  • ✓
    $-32$
     
  • D
    $-64$
✓

Answer

Correct option: C.
$-32$
 
Given, $ (-2)^{2 \times 3-1}$
$=(-2)^{6-1} $
$ =(-2)^5 $
$= (-2) × (-2) × (-2) × (-2) × (-2)$
$= -32$
$[$for $(-a)^m,$ if $m$ is odd, then $(-a)^m$ is negative$]$

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