C33+C43+C53+…+C153等于(  )A.C154B.C164C.C173D.C17

日期:2016-11-28 03:06:14 人气:2

C33+C43+C53+…+C153等于(  )A.C154B.C164C.C173D.C17

根据组合数的性质知道C33+C43+C53+…+C153=C44+C43+C53+…+C153=C54+C53+…+C153=C64+C63+…+C153=…=C154+C153=C164,故选B.
    A+
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