首先y二阶可导
y' = 3ax^2+2bx+c
y'' = 6ax+2b
由题得:
y|x=-2 = 44
y|x=1 = -10
y'|x=-2 = 0
y''|x=-10 = 0得4个方程,解方程组即得参数值
a = 1,b = -3,c = -24,d = 16
首先y二阶可导
y' = 3ax^2+2bx+c
y'' = 6ax+2b
由题得:
y|x=-2 = 44
y|x=1 = -10
y'|x=-2 = 0
y''|x=-10 = 0得4个方程,解方程组即得参数值
a = 1,b = -3,c = -24,d = 16