
Re: [中學] 國中數學

: 若不用孟氏定理,請問如何解,麻煩版上大大了,謝謝!
過O作AC平行線交BE於F
OF : 1 = CE : CD
CO = √5
CD = √5 - 1
=> 1 - (CE/2) = CE/[√5 - 1]
=> CE = 4/[3 + √5]
= 3 - √5
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推
01/29 23:06, , 1F
01/29 23:06, 1F
→
01/29 23:07, , 2F
01/29 23:07, 2F
→
01/29 23:07, , 3F
01/29 23:07, 3F
推
01/29 23:10, , 4F
01/29 23:10, 4F
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