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数学
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求函数f(x)=2x^3-3x+1零点的个数
2x^3 的意思是2乘以 x的3次方.
人气:419 ℃ 时间:2019-08-26 07:49:18
解答
f(x)=2x³-2x²-x+1
=2x²(x-1)-(x-1)
=(2x²-1)(x-1)
=(√2x+1)(√2x-1)(x-1)
三个零点
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