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Which option shows the union of (x\le 1) and (x\ge 4) on the number line?कौन-सा विकल्प संख्या रेखा पर (x\le 1) और (x\ge 4) के union को दिखाता है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: ((-\infty,1]\cup[4,\infty))((-\infty,1]\cup[4,\infty))
The two parts are separate and both (1) and (4) are included. In exams show both rays separately for a union.दोनों भाग अलग हैं और (1) तथा (4) दोनों शामिल हैं। परीक्षा में union में दोनों rays को अलग-अलग दिखाएं।
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