问题已解决
老師,可以幫忙看看這道題目的運(yùn)算過(guò)程是哪步錯(cuò)了嗎?例題的答案是19%(中級(jí)財(cái)務(wù)管理)
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您好
計(jì)算過(guò)程如下 您可以參照一下
(0.1-0.12)^2*0.5+(0.1-0.12)^2*0.3+(-0.05-0.12)^2*0.2=0.0061
算不出來(lái)您的這個(gè)答案啊 可以把您書(shū)上的例題截圖一下嗎
2023 12/19 21:17
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2023 12/19 21:26
我也不知道是哪里出問(wèn)題了,我剛剛說(shuō)錯(cuò)了,例題的答案是0.91%
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2023 12/19 21:30
(0.2-0.12)^2*0.5+(0.1-0.12)^2*0.3+(-0.05-0.12)^2*0.2=0.0091
例題是計(jì)算的正確的哈?
我前面把第一個(gè)括號(hào)的0.2輸錯(cuò)為0.1了 抱歉
您計(jì)算的第一個(gè)括號(hào)應(yīng)該是0.2-0.12=0.08? 第二個(gè)括號(hào)里面不是 -2? 應(yīng)該是-0.02??
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2023 12/19 21:38
老師,你可以一步一步的運(yùn)算過(guò)程列出來(lái)嗎?我不知道是有正負(fù)數(shù)的哪步算錯(cuò)了,我算出來(lái)的是0.0018
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2023 12/19 21:39
(0.2-0.12)^2*0.5=0.0032
(0.1-0.12)^2*0.3=0.00012
(-0.05-0.12)^2*0.2=0.00578
0.0032+0.00012+0.00578=0.0091
這樣分步計(jì)算 可以的嗎?
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2023 12/19 21:40
可以可以
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2023 12/19 21:42
您前面括號(hào)里面的數(shù)據(jù)計(jì)算有誤
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2023 12/19 21:47
負(fù)數(shù)與負(fù)數(shù)相乘得出來(lái)的是正數(shù)嗎?
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2023 12/19 21:48
負(fù)數(shù)與負(fù)數(shù)相乘得出來(lái)的是正數(shù)
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