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10-3x = 8 then 10x = ………………….. A) 1/4B) – 2 C) 2 D) 1/2 |
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Answer» Correct option is (D) 1/2 \(10^{-3x}=8\) \(\Rightarrow\) \((10^{-x})^3=2^3\) \(\Rightarrow\) \(10^{-x}=2\) \(\Rightarrow\) \((10^{-x})^{-1}=2^{-1}\) \(\Rightarrow\) \(10^x=2^{-1}=\frac{1}{2}\) Correct option is D) 1/2 |
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