一道英语奥数题,If you continue the given mumber pattern,in what row and in what position in that row will the number 320 be?1.row123.row2456.row378910.row4The answers are given in the order of row,position
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一道英语奥数题,If you continue the given mumber pattern,in what row and in what position in that row will the number 320 be?1.row123.row2456.row378910.row4The answers are given in the order of row,position
一道英语奥数题,
If you continue the given mumber pattern,in what row and in what position in that row will the number 320 be?
1.row1
23.row2
456.row3
78910.row4
The answers are given in the order of row,position
一道英语奥数题,If you continue the given mumber pattern,in what row and in what position in that row will the number 320 be?1.row123.row2456.row378910.row4The answers are given in the order of row,position
如果按照下列数字继续的话,320将出现在哪一行?在那一行的什么位置?
答案写成“行,位置”的形式
答案很简单啊,第25行从左往右数第20个.
第n行第一个数是1+(1+(n-1))*(n-1)/2
n=25时,就是第25行第一个数是301,因为第n行有n个数,所以这一行有25个数,包含320,那320就是这一行的第20个数.