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Question
Solve −2x ≥ 9 when x is a real number
Solution
Given – 2x ≥ 9
⇒ `- x ≥ 9/2`
⇒ `x ≤ - 9/2`
When x is a real number
`x ≤ - 9/2`
The solution set is `(- ∞, - 9/2]`
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