If f(x)={x, if whenx is rational0, if whenx is irrational;

1.	If f(x)={x, if whenx is rational0, if whenx is irrational; g(x)={0, if whenx is rationalx, if whenx is irrational; then(f−g) is
Answer» If $f (x) = {\begin{matrix} x, & if w h e n x i s r a t i o n a l 0, & if w h e n x i s i r r a t i o n a l \end{matrix}$ ; $g (x) = {\begin{matrix} 0, & if w h e n x i s r a t i o n a l x, & if w h e n x i s i r r a t i o n a l \end{matrix}$ ; then $(f - g$ ) is

If f(x)={x, if whenx is rational0, if whenx is irrational; g(x)={0, if whenx is rationalx, if whenx is irrational; then(f−g) is

Answer»

If $f (x) = {\begin{matrix} x, & if w h e n x i s r a t i o n a l 0, & if w h e n x i s i r r a t i o n a l \end{matrix}$ ;

$g (x) = {\begin{matrix} 0, & if w h e n x i s r a t i o n a l x, & if w h e n x i s i r r a t i o n a l \end{matrix}$ ;

then $(f - g$ ) is