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Find the 4th term from the …

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Find the 4th term from the end of the AP 11,-8,-5,..........49

    • Posted by Sonu Army 5 years, 11 months ago

    CBSE > Class 10 > Mathematics
    • 2 answers

    Yogita Ingle 5 years, 11 months ago

    Given A.P:

    -11,-8,-5,.….,49

    first term (a) = -11,

    {tex}Common\: difference (d)\\=a_{2}-a_{1}\\=-8-(-11)\\=-8+11\\=3{/tex}

    Now,

    Rearranging the terms , from last to first ,we get

    49,46,...,-5,-8,-11

    first term (a) = 49,

    d = 46-49 = -3

    {tex}Fourth\:term (a_{4})=a+3d{/tex}

    {tex}=49+3\times (-3)\\=49-9\\=40{/tex}

    Therefore,

    {tex}Fourth\:term\:the \:last \:of\\the \:A.P = 40{/tex}

     

    0Thank You

    Yuvraj Gupta 5 years, 11 months ago

    4th term of ap is 29

    0Thank You

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