(32%-19%)²*0.4+(17%-19%)²*0.4+(-3%-19%)²*0.2老师能帮算一下过程么?我老算跟答案不一样
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84785015 | 提问时间:2020 04/23 10:13
您好,
=0.13平方*0.4+0.02平方*0.4+0.22平方*0.2
=0.00676+0.00016+0.00968
=0.0166=1.66%
2020 04/23 10:17
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