1.

यदि `x` वास्तविक संख्या है तो `x+1/x!=0` और `x^(3)+1/(x^(3))=0` है तो `(x+1/x)^(4)` का मान ज्ञात करें।A. 4B. 9C. 16D. 25

Answer» Correct Answer - B
`x^(3)+1/(x^(3))=0`
`(x+1/x)^(3)-3x xx 1/x(x+1/x)=0`
`(x+1/x)^(3)-3(x+1/x)=0`
`(x+1/x)^(3)=3(x+1/x)`
`(x+1/x)^(2)=3`
`((x+1/x)^(2))^(2)=(3)^(2)`
`(x+1/x)^(1)=9`


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