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Sum of the first 18 terms of the series ...

Sum of the first 18 terms of the series 1 + 4 + 7 + .......

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Knowledge Check

  • The sum of the first n terms of the series 1/2 +3/4 +7/8 +(15)/(16)+… is

    A
    `2^n -n -1`
    B
    `1-2^(-2)`
    C
    `n+2^(-n) -1`
    D
    `2^n -1`

  • Sum of the first n terms of the series 1/2+3/4+7/8+15/16+ . . . is equal to

    A
    `n-1+(1/2)^(n)`
    B
    `n+(1/2)^(n)`
    C
    `n-1-(1/2)^(n)`
    D
    none of these

  • The sum of the first five terms of the series 3+4 1/2 +6 3/4 +…..will be

    A
    `39 9/(16)`
    B
    `18 3/(16)`
    C
    `39 7/(16)`
    D
    `13 9/(16)`

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