TVET CHNS,Eng,Maths
Senior High
求解
解
8.
(1) 二次函數y = f(x)=ax²+bx+c(a>0),請根據下圖填入判別式D=b²−4ac的條
件。
y=f(x)
VVV
y=f(x)
(2)若y=f(x)=-2x²+4x+k恆負,試求實數k的範圍。
y=f(x)
X
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