设fx=x的三次方-1/2x²-2x+5-m,当x∈[-1,2]时,fx

设fx=x的三次方-1/2x²-2x+5-m,当x∈[-1,2]时,fx
设fx=x的三次方-1/2x²-2x+5-m,当x∈[-1,2]时,fx

设fx=x的三次方-1/2x²-2x+5-m,当x∈[-1,2]时,fx

以上是我的解法,你看看.望你能采纳.