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沒看到圖的說.不過其實和a,b,c關係並不是很大不過函數與方程的關係,一般可以是這樣看:如果有兩個函數f(x)和g(x),他們構成方程f(x)=g(x),那麼方程的根就是兩個函數影像交點的x座標.比如本題,f(x)=ax2+bx+c,方程是ax2…
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