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फलन ` f ( x ) ={{:( -1",""जब", x lt - 1 ), ( - x",""जब", - 1 le x le 1 ), ( 1"," "जब", x gt 1 ):}` सतत है -

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फलन ` f ( x ) ={{:( -1",""जब", x lt - 1 ), ( - x",""जब", - 1 le x le 1 ), ( 1"," "जब", x gt 1 ):}` सतत है -
A. केवल `x = 1 ` पर
B. केवल ` x = - 1 ` पर
C. `x = 1 ` तथा ` x = - 1 ` दोनों पर
D. ` x = 1 ` तथा `x = - 1 ` दोनों पर नहीं
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Correct Answer - D
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