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What is the common solution of (x\ge 2) and (x\le 2)?

Answer and explanation

Correct answer: line (x=2)

The direct answer is option A: the line \(x=2\). Think of the two conditions separately. The statement \(x\ge 2\) allows numbers equal to 2 or greater than 2, while \(x\le 2\) allows numbers equal to 2 or less than 2. A number satisfying both must therefore be neither greater nor less than 2; it must be exactly 2. In the coordinate plane, fixing the x-coordinate at 2 gives a vertical line containing every point \((2,y)\), for all real values of \(y\). Option A is correct because it describes this complete common set. Option B, \(y=2\), is a horizontal line and does not require \(x=2\). Option C, the empty set, is wrong because points such as \((2,0)\) do satisfy both inequalities. Option D, the whole plane, is wrong because a point such as \((3,0)\) fails \(x\le2\). Memory cue: \(\ge\) and \(\le\) at the same number force equality.

Related tags

Linear InequalitiesCommon SolutionVertical LineClass 11

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