The set of all pairs of positive integers with such that
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2 marks, −0.666666666666667MathematicsQuantitative aptitude and data reasoningExponents and logarithmsModerateabout 2 min
DSE 2014 Question 26: Quantitative aptitude and data reasoning
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The set of all pairs of positive integers a,b with a<b such that a^b=b^a (A) is an empty set (B) consists of a single pair (C) consists of multiple, but finite number of, pairs (D) is countably infinite
Quantitative aptitude and data reasoning has come up 92 times in 6 exams since 2008.
What this question tests
This question is on Exponents and logarithms, part of Quantitative aptitude and data reasoning in Mathematics.
Laws of exponents and logarithms and equations that use them.
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Question from the DSE 2014 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.