Question

f(x)是三次函数,且f(0)=3,f'(0)=0,f'(1)=-3,f'(2)=,求满足此关系的函数

Answer 1

f(x)是三次函数=>ax^3+bx^2+cx+d (a!=0)

f'(x)=3ax^2+2bx+c

f(0)=3,f'(0)=0,f'(1)=-3,f'(2)=这个你打掉了,不过无所谓,反正带进去,abcd四个未知数,刚好四个方程,解出来就行了,自己算