tính A=1+1/2(1+2)+1/3(1+2+3)+1/4(1+2+3+4)+…+1/16(1+2+3+…+16)

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tính A=1+1/2(1+2)+1/3(1+2+3)+1/4(1+2+3+4)+…+1/16(1+2+3+…+16)

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Ximena 6 phút 2021-10-22T08:49:16+00:00 1 Answers 0 views 0

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    2021-10-22T08:51:00+00:00

    A=1+1/2(1+2)+1/3(1+2+3)+1/4(1+2+3+4)+…+1/16(1+2+3+…+16)

    ⇒A=1+1/2.3+1/3.6+….+1/16.136

    ⇒A=1+1,5+2+…+8,5

    ⇒A=(8,5+1).[(8,5-1):0,5+1]/2

    ⇒A=76

    #NOCOPY

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