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Let f : N to X : f(x) =4x^(2) +12x +15 ...

Let `f : N to X : f(x) =4x^(2) +12x +15 . " Then " f^(-1)(y)=?`

A

`(1)/(2) (sqrt(y-4+)+3)`

B

`(1)/(2) (sqrt(y-6)-3)`

C

`(1)/(2) (sqrt(y-4)+5)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
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