Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) Let A = [-1, 1] = B then which of the following function from A to B is objective function - Sarthaks eConnect

Let A = [-1, 1] = B then which of the following function from A to B is objective function

`f(x)=x/2`

`g(x)=|x|`

`h(x)=x^2`

`k(x)=sin (pix)/2`