What would you do _ your father wouldn'

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问题选择题

What would you do _ your father wouldn't help you? [ ]

A. why

B. because

C. if

答案

答案：C

解答题

已知函数f(x)= x/4+ln(x-2)/(x-4),(1)求函数f)x)的定义域和极值;(2)若函数(fx)在区间[a²-5a,8-3a]上为增函数,求实数a的取值范围;(3)函数f(x)的图象是否为中心对称图形?若是请指出对称中心,并证明;若不是,请说明理由.

问答题简答题

为什么采煤机割煤时应注意行走机构运行情况？