1.

यदि `x^(2)+1/(x^(2))=98(xgt0)`, हो तो `x^(3)+1/(x^(3))` का मान बताइए?A. 970B. 1030C. -970D. -1030

Answer» Correct Answer - A
`x^(2)+1/(x^(2))=98`
`x^(2)+1/(x^(2))+2=100`
`(x+1/x)^(2)=100`
`x+1/x=10`
`x^(3)+1/(x^(3))=10^(3)-3xx10`
`x^(3)+1/(x^(3))=970`


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