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二次函数y=ax2+bx+c(a≠0)的图象如图所示,则下列说法不正确的是( )...
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二次函数y=ax
2+bx+c(a≠0)的图象如图所示,则下列说法不正确的是( )
A.b
2-4ac>0
B.a>0
C.c>0
D.
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