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外语
n, r, s, and t are positive integers. Column A Column B 2n + r 2s+t
n, r, s, and t are positive integers. Column A Column B 2n + r 2s+t
admin
2009-05-19
9
问题
n, r, s, and t are positive integers.
Column A Column B
2n + r 2s+t
选项
A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案
A
解析
本题的正确答案是(A)。考生在解这道题时一定要小心题目中的陷阱。n,r,s,t都是正数,所以题目中等式的两边也都是正数。考生稍加观察就可注意到2n+r等于等式的左边乘以8,而2s+t则等于等式的右边乘以6。两个本来相同的数一个乘以8,而另一个则乘以6,当然是乘以8所得的那个数大于乘以6的那个数,也即2n+r>2s+t。
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