來(lái)源:網(wǎng)絡(luò)資源 2009-09-20 22:54:07
26.2用函數(shù)觀(guān)點(diǎn)看一元二次方程(2)
●基礎(chǔ)探究
1.已知二次函數(shù)y=ax2-5x+c的圖象如圖所示,請(qǐng)根據(jù)圖象回答下列問(wèn)題:
(1)a=_______,c=______.
(2)函數(shù)圖象的對(duì)稱(chēng)軸是_________,頂點(diǎn)坐標(biāo)P__________.
(3)該函數(shù)有最______值,當(dāng)x=______時(shí),y最值=________.
(4)當(dāng)x_____時(shí),y隨x的增大而減小.
當(dāng)x_____時(shí),y隨x的增大而增大.
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