如图,PM1⊥M1M2,PM2⊥M2M3,PM3⊥M3M4,...且PM1=M1M2=M2M3=M3M4=...=Mn-
1个回答
全是勾股定理,
PM2 = 2开方
PM3 = 3开方
.
PMn= n开方
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