Question

若x=2时,ax的5次方+bx的3次方+2=3,求x=-2时,ax的5次方+bx的3次方+2等于多少

Answer 1

把x = 2代入得：

32a + 8 b + 2 = 3

32a + 8b = 1

-32a - 8b = -1

把x = -2代入得：

-32a -8b + 2

= -1 + 2

= 1