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S12 = S8+S4 Prove that.

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S12 = S8+S4 Prove that.

    • Posted by Prabhat Arela 2 years, 5 months ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Mannu Dahiya 2 years, 5 months ago

    12/2(2a+11d)=8/4(2a+7d)+4/2(2a+3d) => 6(2a+11d)=4(2a+7d)+2(2a+3d) => 12a+66d=8a+28d+4a+6d =>12a+66d=12a+34d. S12≠S8+S4

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