Objective question in Mathematics

If {{x}^{y}}={{y}^{x}},then {{(x/y)}^{(x/y)}}={{x}^{(x/y)-k}},where k= a) 0 b) 1 c) -1 d) 2

1 Answers

Can anyone please help me solving this sum .
x^y =y^x , then (x/y)^(x/y)=x^y-k .Then what is the value of k ?

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

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