解不等式(x-1)(x-2)(x-3)(x-4) >=25
解不等式(x-1)(x-2)(x-3)(x-4) >=25
数学人气:289 ℃时间:2020-04-02 16:37:35
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(x-1)(x-2)(x-3)(x-4) ≥25(x-1)(x-4)(x-2)(x-3)-25≥0(x²-5x+4)(x²-5x+6)-25≥0(x²-5x+4)²+2(x²-5x+4)-25≥0(x²-5x+4+1)²≥26x²-5x+5≥√26x²-5x+5-√26≥0x≥(5+√(...
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