# Let f(x) = {4x-5, if x <= 7                      -3x + b, if x > 7 If ?(?)f(x) is a function which is continuous everywhere, then we must have

Question

Let f(x) = {4x-5, if x <= 7

-3x + b, if x > 7

If ?(?)f(x) is a function which is continuous everywhere, then we must have