1.

If2x = sqrt(a) - (1)/(sqrt(a)) , then the value of(sqrt(x^(2) + 1))/(x + sqrt(x^(2) +1)) is

Answer»

a+1
`(1)/(2)((a+1)/(a))`
`(1)/(2) ((a-1)/(a))`
`a-1`

ANSWER :B


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