InterviewSolution
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InterviewSolution
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यदि `x-1/x=2` तो निम्नलिखित का मान क्या होगा-`x^(3)-1/(x^(3))=?`A. 2B. 11C. 15D. 14 |
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Answer» Correct Answer - D `x-1/x=2` to find `x^(3)-1/(x^(3))=?` `implies x-1/x=2implies(x-1/x)^(3)` `=2^(3)` cubing both side `implies x^(3)-1/(x^(3))-3xx x xx 1/x(x-1/x)=8` `implies x^(3)-1/(x^(3))-3xx 1xx(2)=8` `implies x^(3)-1/(x^(3))=14` |
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