railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Algebra Identities

यदि (x + y)3 - (x - y)3 - 3y(2x2 - 3y2) = ky3 है, तब k का मान ज्ञात कीजिए। 

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8
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11
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10.5
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