Question

已知y=ax的五次方+bx的三次方+cx-5,当x=-3时,y=7,那么当x=3时,y的值等于?

Answer 1

x=-3,y=-3^5a-3^3b-3c-5=7

3^5a+3^3b+c=-12

x=3,y=3^5a+3^3b+c-5=-12-5=-17