Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) Let `f A -> B = [0,oo)` be a function defined by f (x)= |x|, then - Sarthaks eConnect

Let `f : A -> B = [0,oo)` be a function defined by f (x)= |x|, then

f is a bijection

If A = `(-oo,1)`, then `f : A -> B` is a bijection

If A =[-1,1], then `f : A -> B` is a bijection.

If A = B, then `f^-1` (x)= x for all `x in A`