1,C52*C42;2,C41*C31;3,C41*C31+C83+C83;4,C51*C43+C52*C42+C53*C41
<p>问题:1,C52*C42;2,C41*C31;3,C41*C31+C83+C83;4,C51*C43+C52*C42+C53*C41<p>答案:↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">耿汝年的回答:<div class="content-b">网友采纳 是组合吧~ 1,C52*C42=60 2,C41*C31=12 3,C41*C31+C83+C83=124 4,C51*C43+C52*C42+C53*C41=120
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