how do you Find numbers a and b, or k, so that f is continuous at every point?

Question

anonymous · Answer

it depens on the probleme

sid1729 · Answer

Yeah, we need to know what f is.

anonymous · Answer

Okay well this one is just an example,
I have like, 7 problems I have to do like this, but I need
an explanation as to how to solve it.

F(x)= {x^2, x<-5
          ax + b, -5$$\le$$x$$\le$$4
          x+12,  x>4

i just really really need someone to explain how to
solve these equations so I can understand it and at
least pass this part of my calculus class.