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Determine the number of terms in the A.P...

Determine the number of terms in the A.P.3,7,11,......,407.Also find its 20th term from the last.

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How many terms are there in the A.P. 3, 7, 11, ... 407?

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Knowledge Check

  • The number of terms of the A.P. 3,7,11,15… to be teken so that the sum is 406 is-

    A
    14
    B
    16
    C
    20
    D
    24
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