Question

Interval help!

Answer 1

Would it be [-oo,1)(3,oo] ?

Answer 2

exclude the infinities

Answer 3

So (1,3) ?

Answer 4

NOOO infinities should be applied because of the arrows. They should also be closed with parentheses since they're infinities

Answer 5

So you had it right the first time but use parentheses

Answer 6

We can't define what is infinity is so it will be in open interval like (-oo, 1)U (3,oo)