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1. ab=c,bc=aও Ca=b

Answer: Option C

Explanation:

দেওয়া আছে, a^{b} = c . . . . . . . . (i) b^{c} = a . . . . . . . . . (i i) c^{a} = b . . . . . . . . . (i i i) (i i) \times (i i i) আমরা পাই, b \times b = c^{a} \times c^{a} \Rightarrow b^{2} = c^{a + a} \Rightarrow b^{2} = c^{2 a} \Rightarrow b^{2} = a^{b \times 2 a} \Rightarrow b^{2} = b^{c \times b \times 2 a} \Rightarrow b^{2} = b^{2 a b c} \Rightarrow 2 a b c = 2 \Rightarrow a b c = 1 a b = \frac{1}{c}

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