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The sum of the first three terms of an A...

The sum of the first three terms of an `A.P.` is 9 and the sum of their squares is `35.` The sum to first n terms of the series can be

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The correct Answer is:
1,3,5 or 5,3,1
N/a
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Knowledge Check

  • The sum of the first three terms of an increasing G.P. is 21 and the sum of their squares is 189. Then the sum of its first n terms is

    A
    `3(2^(n) -1)`
    B
    `12(1 - (1)/(2^(n)))`
    C
    `6(1 - (1)/(2^(n)))`
    D
    `6 (2^(n) -1)`

  • The sum of first p terms of an A.P. is q and the sum of the first q terms is p. The sum of the first (p + q) terms is

    A
    p + q
    B
    0
    C
    `- (p + q)`
    D
    `-2 (p + q)`

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    The sum of the first three terms of an increasing G.P.is 21 and the sum of their squares is 189. Then the sum of the first n terms is

    . The sum of the first three terms of an increesing G.P. is 21 and the sum of their squares is 189. Then the sum of its first n terms is

    The sum of three consecutive terms of an A.P. is 9 and the sum of their squares is 35. Find the terms.

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