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1. $S = \{x \in N : x^{2} > 8, x^{3} < 30\}$

Answer: Option A

Explanation:

এখানে, N = 1, 2, 3, 4, . . . . . x = 1 হলে x^{2} = 1 ≯ 8 আবার x^{3} = 1 < 30 x = 2 হলে x^{2} = 4 ≯ 8 আবার x^{3} = 8 < 30 x = 3 হলে x^{2} = 9 > 8 আবার x^{3} = 27 < 30 x = 4 হলে x^{2} = 16 > 8 আবার x^{3} = 64 ≮ 30 সুতরাং প্রকৃত উপসেট = \{3\}

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