InterviewSolution
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InterviewSolution
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यदि `4b^(2)+1/(b^(2))=2` है तो `8b^(3)+1/(b^(3))` का मान क्या है? |
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Answer» Correct Answer - A `4b^(2)+1/(b^(2))=2` `(2b)^(2)+(1/b)^(2)+4-4=2` `(2b+1/b)^(2)-4=2` `(2b+1/b)^(2)=6` `2b+1/b=sqrt(6)` Take cube both sides `(2b+1/b)^(3)=(sqrt(6))^(3)` `8b^(3)+1/(b^(3))+3xx2bxx1/b(2b+1/b)=6sqrt(6)` `8b^(3)+1/(b^(3))+6sqrt(6)=6sqrt(6)` `8b^(3)+1/(b^(3))=0` |
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