题目若点A(−4,y1)A\left(-4,y_{1}\right)A(−4,y1),B(−1,y2)B\left(-1,y_{2}\right)B(−1,y2),C(1,y3)C\left(1,y_{3}\right)C(1,y3)在抛物线y=−12(x+2)2−1y=-\dfrac{1}{2}\left(x+2\right)^{2}-1y=−21(x+2)2−1上,则（ ）A.y1<y3<y2y_{1} \lt y_{3} \lt y_{2 }y1<y3<y2B.y2<y1<y3y_{2} \lt y_{1} \lt y_{3}y2<y1<y3C.y3<y2<y1y_{3} \lt y_{2} \lt y_{1}y3<y2<y1D.y3<y1<y2y_{3} \lt y_{1} \lt y_{2}y3<y1<y2知识点：二次函数的性质I章节：函数 / 二次函数
