MCQ
જો $n(A^ 2 ) = 25$ હોય, તો $n (A)$ = ..........
- ✓$5$
- B$\pm 5$
- C$25$
- D$10$
$n(A^2) = 25$
$n(A \times A) = 5 \times 5$
$n(A) = 5$
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