10月1-10日数学机井总结
2003-10-07 22:53:00
mba8倾情奉献:机井总结
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1.在平面上有两点,分别为(1,-3)和(8,4),第三点(x,0)到这两点的距离相等,求x.
答案:5
2.有集合{A,B,C},他的子集是{A},{B},{C},{A,B},{A,C}…{空集}。问集合{R,S,T,U,V,W}中没有T的子集有多少个
答案:32
3.圆环套圆,圆环面积是圆的3倍,求周长比。
答案:根号2
4.Three way of payments: less 10 people, pay total of 100; between 10 and 20
(<20), pay 100 total and plus 10 each; above 20, pay 20 each. How much paid by
A?
1) A has two more people than B (11-9)
2) A pays 10 more than B
答案:C
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