2ٽ̩ⷽx+6x5=0x1=1x2=5A10 B50C05 OCBΪֱΣ OBC=OCB=45㣬 AMBC
AMBΪֱΣ AM=
AB=
4=2
2
ԵAMPQΪıƽıΣAMPQ PQ=AM=2
PQBC
PDxύֱBCDͼ1PDQ=45㣬 PD=
PQ=
2
=4
Pmm2+6m5Dmm5 PֱBCϷʱ
PD=m2+6m5m5=m2+5m=4m1=1m2=4 PֱBC·ʱ
PD=m5m2+6m5=m25m=4m1=PĺΪ4
m2=
ANBCNNHxHACĴֱƽ߽BCM1ACEͼ2 M1A=M1C ACM1=CAM1 AM1B=2ACB
ߡANBΪֱΣ AH=BH=NH=2 N32
ACĽʽΪy=5x5EΪ ֱEM1ĽʽΪy=x+b Eé
+b=b=
ֱEM1ĽʽΪy=x
ⷽ
M1
ֱBCM1NĶԳƵM2ͼ2AM2C=AM1B=2ACB
M2xx5 3=x=M2
MΪ
˶κۺ⣺նκͼϵκʡֱǵжʺƽıεʣôϵʽͼʣ÷۵˼ѧ⣮