2.如圖,二次函數(shù)y=(x+2)
2+m 的圖象與y軸交于點(diǎn)C,點(diǎn)B在拋物線上,且與點(diǎn)C關(guān)于拋物線的對稱軸對稱,已知一次函數(shù)y=kx+b(k≠0,k,b為常數(shù))的圖象經(jīng)過該二次函數(shù)圖象上的點(diǎn)A(-1,0)及點(diǎn)B.
(1)求二次函數(shù)與一次函數(shù)的表達(dá)式;
(2)若點(diǎn)P為拋物線上一點(diǎn),S
△BCP=4,求出此時(shí)P點(diǎn)坐標(biāo);
(3)根據(jù)圖象,當(dāng)(x+2)
2-kx≥b-m時(shí),則x的取值范圍
.