A function f : R ⇢ R defined by f(= 2 + x2 is
A. not one-one
B. one-one
C. not onto
D. neither one-one nor onto
Answer:D
A function f : R ⇢ R defined by f(= 2 + x2 is
A. not one-one B. one-one C. not onto D. neither one-one nor onto