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57-x = 5° then x = ………………. A) 13 B) 7 C) 3 D) 4 |
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Answer» Correct option is (B) 7 \(5^{7-x}=5^0\) \(\Rightarrow\) 7 - x = 0 \(\Rightarrow\) x = 7 Correct option is B) 7 |
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