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(3)125-8x³=0(4)x²+1=1.01
人气:472 ℃ 时间:2020-06-19 03:56:48
解答
(3)125-8x³=0125 = 8x³ (2x)³ = 5³2x = 5 x = 2.5 (4)x²+1=1.01x² = 1.01 - 1x² = 0.01x1 = 0.1 x2 = -0.1
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