Practicing Success
Practicing Success
CUET Preparation Today
Let A , B , and C be subsets of real numbers. Let f : A → B and g: B → C be two functions such that gof is onto. the which of the following is true |
f and g both are necessarily onto f is necessarily onto f need not be onto None of these |
f need not be onto |
$g(f(x))$ → onto ⇒ for every $g(f(x))$ there exists atleast one $f(x)$ but $f(x)$ ⇒ there exist atleast one $x$ so $f(x)$ is not necessarily onto |
