1.

यदि `p^(3)-q^(3)=(p-q){(p+q)^(2)-xpq}` हो तो `x` का मान क्या है?A. 1B. -1C. 2D. -2

Answer» Correct Answer - A
`p^(3)-q^(3)=(p-q)(p^(2)+q^(2)+pq)`
`(p-q){(p+q)^(2)-xpq}=(p-q)(p^(2)`
`+q^(2)+pq)`
`p^(2)+q^(2)_2pq-xpq=p^(2)+q^(2)+pq`
`2pq-pq=xpq`
`pq=xpq`
`:. x=1`


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