计算:C22+C32+…+C102(  )A.160B.165C.55D.11

日期:2016-02-29 01:37:43 人气:1

计算:C22+C32+…+C102(  )A.160B.165C.55D.11

C22+C32+…+C102=C33+C32+…+C102=C33+(C43-C33)+(C53-C43)+…+(C113-C103)=C113 =165,故选:B.
    A+
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