Express the solution set of the inequality 2x + 1 < 15 or 3x − 4 ≥ − 1 in set builder notation?
It's multiple choice, please explain, thanks
A. Ø
B. { x| x is a real number}
C. {x| x < 7}
D. {x|x≥ 1}
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2x + 1 < 15
=> 2x < 14
=> x < 7
3x − 4 ≥ − 1
=> 3x ≥ 3
=> x ≥ 1
1 ≤ x < 7, B is the only one that is fully true. C and D are only martially true, and A is totally wrong