不一定对
思路：2x^5+8x-7 =0
2x^5+8x=7
2x(x^4+8)=7
可以确定x只能是正值,解只能有一个
麻烦有正确答案后告知一下 哈哈
How many real roots does the polynomial 2x^5+8x-7 have?
1个回答
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