2007-12-8 10:07 PM
Destiny_homan
F4 AMATH 一條
請大家幫幫忙!!~
thx~
3cotx^2+(3+開方3)cotx+開方3=0
2007-12-8 10:38 PM
仲
let cotx be y
跟住當係普通 quadratic咁 solve
2007-12-9 09:57 AM
Destiny_homan
下...
得咩?
中間係(3+開方3)wo,都冇乘2 & 3同開方3都唔係乘埋一齊- -
點解ar- -
難道要用配方法?
2007-12-24 03:18 PM
四奇
咪又係咁做...
3cotx^2+(3+開方3)cotx+開方3=0
3y^2+(3+開方3)y+開方3=0
(y+1)(3y+開方3)=0
之後自己做...
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