5 ≤ 3x + 1 < 16 অসমতাটির সমাধান কোনটি?
Solution
Correct Answer: Option A
5 ≤ 3x + 1 < 16
= 5 - 1 ≤ 3x + 1 - 1 < 16 - 1
= 4 ≤ 3x < 15
= 4/3 ≤ x < 15/3
= 4/3 ≤ x < 5
∴ অসমতাটির সমাধান [4/3, 5)
= 5 - 1 ≤ 3x + 1 - 1 < 16 - 1
= 4 ≤ 3x < 15
= 4/3 ≤ x < 15/3
= 4/3 ≤ x < 5
∴ অসমতাটির সমাধান [4/3, 5)
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