1.

11 + 103 + 1005 +…….up to n terms is…….

Answer»

`(1)/(9) (10^(N)-1) + n^(2)`
`(10)/(9) (10^(n)-1) + n^(2)`
`(10)/(9) (10^(n)-1) + 2N`
NONE of these

Answer :B


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