1.2345*0.2345*2.469-1.2345³-1.2345*0.234²
=-1.2345*(1.234² -2*0.2345*1.2345-1.2345²)
=-1.2345*(1.234-0.234)²
=-1.2345
1.2345*0.2345*2.469-1.2345³-1.2345*0.234² 等于-1.2345,咋算的?
1.2345*0.2345*2.469-1.2345³-1.2345*0.234² 等于-1.2345,咋算的?
数学人气:415 ℃时间:2019-12-18 23:57:56
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