Answers

2014-05-18T19:45:49+05:30
Lim     (e^1/x - 1) / (e^1/x + 1)
x----->0
= lim      (1 - e^-1/x) / (1 + e^-1/x)               (divided by e^1/x)
x------>0
= (1 -0) /(1 + 0)                (e^-1/0 = e^-∞ = 1/e^∞ = 1/∞ = 0)
= 1 
hence option (B) is correct
0
Even i got the same answer but the correct option is given as option D.