1. given:

need to find all the constants c for which the function is continuous in the section (-oo,+oo).

2.given: calculate the limit of (ignore the marks), from what i calculated it's supposed to be 17.2 but i think it's wrong somehow.

also need to prove that g(x) isn't continuous in the section (-oo,+oo)

I have tried for more than an hour to solve these and I am very frustrated by now.

appreciate your help, thanks.