XAT 2021Quantitative AbilityLogarithms, Surds and IndicesEASY+1 / −0.25

If $\log_4m + \log_4n = \log_2(m + n)$ where m and n are positive real numbers, then which of the following must be true?

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XAT 2021Quantitative AbilityLogarithms, Surds and IndicesEASY+1 / −0.25

Select an option to reveal the answer and explanation

Practice the full paper

Attempt XAT 2021 Question Paper with real exam interface and instant grading.

If log⁡4m+log⁡4n=log⁡2(m+n)\log_4m + \log_4n = \log_2(m + n)log4​m+log4​n=log2​(m+n) where m and n are positive real numbers, then which of the following must be true?