MCQ
જો $n(A^3) = 8$ અને $(1, 1, 2) \in A^3$ તો $A$ = ......
- A$A = \left\{1, 2, 3\right\}$
- ✓$A = \left\{1, 2\right\}$
- C$A = \left\{1, 3\right\}$
- D$A = \left\{1, 8\right\}$
$n(A^3) = 8 \Rightarrow [n(A)]^3 = 8$
$\Rightarrow n(A) = 2$
હવે ,$(1,1,2) \in A^3$ $\Rightarrow 1,2 \in A $
$\therefore A = \left\{1,2\right\}$
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