Suppose $f(x)=\lfloor x \rfloor$ for $x \geq 0$. Define a sequence of functions $(f_n(x))_{n \geq 1}$ where
$f_n(x) = \left\{ \begin{array}{lr} x^n & : x \in [0,1)\\ (x-1)^n+1 & : x \in [1,2)\\ (x-2)^n+2 & : x \in [2,3)\\ \vdots \\ \end{array} \right.$
Questions:
$1)$ Is $f_n(x)$ continuous for all $x \geq 0$?
$2)$ Does the function $f_n(x)$ converge pointwise to $\lfloor x \rfloor$?
If yes to both questions above, can we write $f_n(x)$ in a single function instead of piece-wise function?
My guess: Yes to both questions. But I am unable to express $f_n(x)$ in a single function.
Note that $(x-k)^n + k \rightarrow k$ for $x \in [k,k+1)$, since $0 \leq (x-k) < 1$.