Question

Which of the following is a solution of the compound inequality -1 < 2n + 1 < 5?
1)-1 < n < 5
2)n > 2 or n < -1
3)-1 < n < 2
4)n < -2 or n > 4

Answer 1

-1<2n+1<5 Separate this inequality into 2 inequalities

-1<2n+1
-2<2n
-1<n

2n+1<5
2n<4
n<2

Therefore, you get: -1<n<2 This is the 3rd choice given

Answer 2

thankyou!

Answer 3

You're welcome