For which value of kkk is f(x)={kx2−2x≤32x+1x>3f(x) = \begin{cases} kx^2 - 2 & x \leq 3 \\ 2x + 1 & x > 3 \end{cases}f(x)={kx2−22x+1x≤3x>3 continuous at x=3x = 3x=3?
k=1k = 1k=1
k=2k = 2k=2
k=79k = \frac{7}{9}k=97
k=3k = 3k=3