the average of n consecutive integers beginning with 1 is 12Quantity A: nQuant

游客2025-02-23 16

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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the average of n consecutive integers beginning with 1 is 12Quantity A: nQuant

Foreachintegern>1,letA(n)denotethesumoftheintegersfrom1ton.For

Ifanintegerisrandomlyselectedfromallpositive2-digitintegers,whatist

Howmany3-digitpositiveintegersareoddanddonotcontainthedigit5?288

Whichoftheintegers2,9,19,29,30,37,45,49,51,83,90,and91areprime

Whichoftheintegers312,98,112,and144aredivisibleby8?312,112,and14

Forhowmanypositiveintegersnlessthan40isthenumberofpositivefactors

Ifonenumberischosenatrandomfromthefirst1,000positiveintegers,whati

If2,4,6,7,8,and9arethedigitsoftwo3-digitintegers,whatistheleas

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