domain and inverse

[hardik]

how to find the value of "A" for which a function has an inverse...

solve dis problem question 11th 3rd and 4th
(http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_s10_qp_12.pdf)

 

[Afeef]

The value has to be calculated through graph if i am not wrong.