1.

यदि `P+1/(p+2)=1` का `(p+2)^(3)+1/((p+2)^(3))-3` मान बताइएA. 12B. 16C. 18D. 15

Answer» Correct Answer - D
`P+(P+2)=1`, find the value
of `(P+2)^(3)+1/((P+2)^(3))-3`
Adding 2 on both sides
`(P+2)+1/((P+2))=3`
Taking cube on both sides
`(P+2)^(3)+1/((P+2)^(3))+3(P+2)xx1/((P+2))`
`[(P+2)+1/(P+2)]=((P+2)+1/((P+2)))^(3)`
`=3^(3)=27`
`(P+2)^(3)+1/((P+2)^(3)+9)=27`
`(P+2)^(3)+1/((P+2)^(3))=18`
According to the questions
`18-3implies15`


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