计算:C22+C32+…+C102( )A.160B.165C.55D.11
计算:C22+C32+…+C102( )A.160B.165C.55D.11
日期:2016-02-29 01:37:43 人气:1
C22+C32+…+C102=C33+C32+…+C102=C33+(C43-C33)+(C53-C43)+…+(C113-C103)=C113 =165,故选:B.
计算:C22+C32+…+C102( )A.160B.165C.55D.11