解一道有英语的奥数题:The sum of n different positive integers is less
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解一道有英语的奥数题:The sum of n different positive integers is less than 50.
The sum of n different positive integers is less than 50.The greatest possble value of n is( )
A.10 B.7 C.8 D.9
其中positive integers 是正整数的意思.
求奥数和英语都特厉害的大师相救啊!
回答时顺便列一下式子啊!
The sum of n different positive integers is less than 50.The greatest possble value of n is( )
A.10 B.7 C.8 D.9
其中positive integers 是正整数的意思.
求奥数和英语都特厉害的大师相救啊!
回答时顺便列一下式子啊!
n个不同的正整数和小于50,那么这个n的最大可能值为9
,这几个数是从1到9,总和是45=(1+9)*9/2
,这几个数是从1到9,总和是45=(1+9)*9/2
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