Solve the following inequation and find the cardinality of the solution set.
2x+33≥ 3x−14 where x is positive even integer.
7
We have
(2x + 3)4 ≥ (3x - 1)3
8x + 12 ≥ 9x – 3
15 ≥ x
∴ x ≤ 15
So, x ϵ{2, 4, 6, 8, 10, 12, 14}
Hence the cardinality of the solution set = 7