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Math Help - A.P.

  1. #1
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    A.P.

    If (m+1)th term of A.P. is twice the (n+1)th term . Then show that (3m+1)th term is twice the (m+n+1)th term.

    I'm confused with this one. No idea how to do this. Any help wpuld be appriciated.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by aman View Post
    If (m+1)th term of A.P. is twice the (n+1)th term . Then show that (3m+1)th term is twice the (m+n+1)th term.

    I'm confused with this one. No idea how to do this. Any help wpuld be appriciated.
    You are given:

    a+(m+1)\rho=2(a+(n+1)\rho)

    Then

    a+(3m+1)\rho=a+(m+1)\rho+2m\rho= ...

    CB
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  3. #3
    Newbie
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    answer(AP)

    Quote Originally Posted by aman View Post
    If (m+1)th term of A.P. is twice the (n+1)th term . Then show that (3m+1)th term is twice the (m+n+1)th term.

    I'm confused with this one. No idea how to do this. Any help wpuld be appriciated.
    to me it should be (3n+1)th term instead of (3m+1)th term...
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