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

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
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！

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
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

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
所以选B

正D