A) \[\frac{2x}{y}\]
B) \[6\]
C) \[2\]
D) \[4\]
Correct Answer: C
Solution :
\[\left( \frac{2}{1+{{a}^{x-y}}}+\frac{2}{1+{{a}^{y-x}}} \right)\] \[=\,\,\,2\left[ \frac{{{a}^{y}}}{{{a}^{y}}+{{a}^{x}}}+\frac{{{a}^{x}}}{{{a}^{x}}+{{a}^{y}}} \right]\] \[=\,\,\,2\left[ \frac{{{a}^{x}}+{{a}^{y}}}{{{a}^{x}}+{{a}^{y}}} \right]=\]
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