If e^(f(x))=(10+x)/(10-x), x in (-10,10)...

If `e^(f(x))=(10+x)/(10-x), x in (-10,10) and f(x) = kf ((200x)/(100+x^2))` , then k = a)0.5 b)0.6 c)0.7 d)0.8

A

0.5

B

0.6

C

0.7

D

0.8

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The correct Answer is:

A

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