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1
1
admin
2009-05-19
18
问题
1
n is an integer
Column A Column B
The sum of the first n odd integers that are greater than zero n² - 1
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
本题的正确答案为(A)。左项为大于0前n个奇数的和,注意前n个大于0奇数的和为n的平方,n为个数。例如1+3=2的平方;1+3+5=3的平方;1+3+5+7=4的平方等。
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本试题收录于:
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