What value of kkk makes f(x)={kx+1x≤2x2−1x>2f(x) = \begin{cases} kx + 1 & x \leq 2 \\ x^2 - 1 & x > 2 \end{cases}f(x)={kx+1x2−1x≤2x>2 continuous at x=2x=2x=2?
111
32\frac{3}{2}23
222
333