Question
Mathematics Question on linear inequalities
If 23x−4≥4x+1−1, then x∈
A
[1, ∞)
B
(1, ∞)
C
(−5, 5)
D
[−5, 5]
Answer
[1, ∞)
Explanation
Solution
We have 23x−4≥4x+1−1 or, 23x−4≥4x−3 or, 2(3x−4)≥(x−3) or, 6x−8≥x−3 or, 5x≥5 or x≥1 Thus all real numbers which are greater than or equal to 1 is the solution set of the given inequality ∴x∈[1, ∞)