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If log x4 = 0.4 then the value of x is?

Correct Answer: 32

Explanation:

logx4 = log 4 / log x = 2/5
⇒ 2log2 / log x = 2/5
⇒ log x =5log 2 = log 25
⇒ log x = log 32
∴ x = 32


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