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the average of n consecutive integers beginning with 1 is 12 Quantity A: n Quantity B: 24
the average of n consecutive integers beginning with 1 is 12 Quantity A: n Quantity B: 24
admin
2022-10-18
32
问题
the average of n consecutive integers beginning with 1 is 12
Quantity A: n
Quantity B: 24
选项
A、Quantity A is greater.
B、Quantity B is greater.
C、The two quantities are equal.
D、The relationship cannot be determined from the information given.
答案
B
解析
利用等差数列的求和公式,那么S=12n=n(n+1)/2,n=23,选择B。
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