1.

If (1+x)^(n)=1+C_(1)x+C_(2)x^(2)+ . . .+C_(n)x^(n), then: C_(1)^(2)-2C_(2)^(2)+3C_(3)^(2)- . .. -2nC_(2n)^(2) is:

Answer»

`N^(2)`
`(-1)^(n-1)n`
`(-1)^(n-1)n.""^(2n-1)C_(n)`
`-n^(2)`

ANSWER :C


Discussion

No Comment Found

Related InterviewSolutions