分类讨论 X-1和0的关系:
若上式大于0,则结果为:3(x-1)
若上式等于0,则为0
若上式小于0,则结果为:3(1-x)
9乘以(x-1)的平方的平方根,等于多少?
9乘以(x-1)的平方的平方根,等于多少?
此平方为x-1的平方
此平方为x-1的平方
数学人气:111 ℃时间:2020-05-23 15:03:16
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