Practicing Success
Let f be a function defined on R by $f(x)=[x]+\sqrt{x-[x]}$, then |
f is not continuous at every x ∈ I f is not continuous at every x ∈ R ~ I f is a continuous function none of these |
f is a continuous function |
$f(x)=n+\sqrt{x-n},\,n≤x<n+1$ If $x_0=K∈I$, then $\underset{x→K+}{\lim}f(x)=\underset{x→K}{\lim}K+\sqrt{x-K}=K$ and $\underset{x→K-}{\lim}f(x)=\underset{x→K-}{\lim}(K-1)+\sqrt{x-(K-1)}$ $=\underset{x→K}{\lim}(K-1)+\sqrt{x-(K-1)}=K-1+1=K$ Hence f is continuous at every $x_0=K∈I$. If $x_0∈R~ I$, then [x] is continuous at x0 which is |