(本小题满分7分)计算:

(本小题满分7分)计算:

题型:解答题难度:一般来源:不详
(本小题满分7分)计算:
答案
解:原式···················································· (4分)
································································································ (3分)
解析

举一反三
(11·贺州)下列计算正确的是
题型:单选题难度:一般| 查看答案
下列等式不成立的是(     )
A.B.C.D.

题型:单选题难度:一般| 查看答案
写出一个大于3且小于4的无理数:___________.
题型:填空题难度:一般| 查看答案
(2011•广州)四个数﹣5,﹣0.1,中为无理数的是(  )
A.﹣5B.﹣0.1
C.D.

题型:单选题难度:一般| 查看答案
(2011•广州)当实数x的取值使得有意义时,函数y=4x+1中y的取值范围是(  )
A.y≥﹣7B.y≥9
C.y>9D.y≤9

题型:单选题难度:一般| 查看答案
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