设x=AP,y=BA=BE,
S1=x^2=s2=(y-x)*y
x^2+xy-y^2=0
x=(1/2){-y+(y^2+4y^2)^(1/2)}=(1/2){-y+[5y^2]^(1/2)}
=(y/2){-1+5^(1/2)}
x/y={5^(1/2)-1}/2
P点是AB的黄金分割点
设x=AP,y=BA=BE,
S1=x^2=s2=(y-x)*y
x^2+xy-y^2=0
x=(1/2){-y+(y^2+4y^2)^(1/2)}=(1/2){-y+[5y^2]^(1/2)}
=(y/2){-1+5^(1/2)}
x/y={5^(1/2)-1}/2
P点是AB的黄金分割点
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