`684`
`-171`
`171`
`- 342`
`2^(n-1)`
`2^n`
`2^(n+1)`
`2^(2n)`
`101^50`
`99^50 +100^50`
both are equal
None of these
`90`
`88`
`93`
`95`
`4`
`2`
`9`
`6`
`(text()^(2n) C_n)^2`
`text()^(2n) C_n`
`text()^(2n) C_n +1`
`text()^(2n) C_n-1`
`-15/4`
`15/4`
`-9/4`
`4`
`(n-4)/5`
`(2(n-4))/5`
`5/(n-4)`
`5/(2(n-4))`
`text()^(20)C_(10)`
`text()^(30)C_(25)`
`1`
`0`
` 1^2 + 2^2 + 3^2 + ... + n^2`
` 1^3 + 2^3 + 3^3 + ... + n^3`
`1 + 2 + 3 + ... + n`
`1^4 + 2^4 + 3^4 + ... + n^4`
`5`
`6`
`4`
`7`
`S_n/n 2^n`
`(S_(n+1))/(n+1) 2^(n-1)`
`(S_(n+1))/(n+1) 2^n`
`S_n/n 2^(n-1)`
`(-1)^(n-1) n`
`(-1)^n(1- n)`
`(-1)^(n-1) (n -1)^2`
`(n - 1)`
` 2^n/(n!)`
`(2^n - 2)/(n!)`
`( 2^(n-1) - 1)/(n!)`
`(2^(n - 1))/(n!)`
`4`
`2`
`5`
`3`
` text()^(19)C_9`
` text()^(20)C_(10)`
` text()^(21)C_(11)`
` text()^(22)C_(12)`
`text()^10 C_1`
`5//12`
`1`
None of these
`20`
`21`
`10`
`11`
`4`
`8`
`16`
`32`