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GATE DA 2026 Q4: Compare n^(log m) and m^(log n)

Question

Consider two distinct positive real numbers m,nm, n, with m>nm > n.

Let x=nlog⁡10(m)x = n^{\log_{10}(m)} and y=mlog⁡10(n)y = m^{\log_{10}(n)}. The relation between xx and yy is _______.

Try it: multiple choice: exactly one correct option

Select one option
Wrong answer costs 1/3 mark in GATE.
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Answer: C (official GATE 2026 final answer key)

Concept used: Logarithm identity: alog⁡b=blog⁡aa^{\log b} = b^{\log a}.

First step: Take log⁡10\log_{10} of both: log⁡x=log⁡m⋅log⁡n=log⁡y\log x = \log m \cdot \log n = \log y.

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Source: official GATE 2026 DA question paper and final answer key, organised by IIT Guwahati. Question paper · Answer key