题目内容
如图所示的三角形数阵叫“莱布尼兹调和三角形”,它们是由整数的倒数组成的,第n行有n个数且两端的数均为 (n≥2),每个数是它下一行左右相邻两数的和,如 ,…,则第10行第4个数(从左往右数)为 |
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A、 ![]() B、 ![]() C、 ![]() D、 ![]() |
试题答案
B
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(n≥2),每个数是它下一行左右相邻两数的和,如
,…,则第10行第4个数(从左往右数)为 















