2. 外语
  3. If kSn is defined to be the product of (n + k)(n - k + 1) for all positive integers k and n, which of the following expressions

If kSn is defined to be the product of (n + k)(n - k + 1) for all positive integers k and n, which of the following expressions

admin2022-10-18  37
问题 If kSn is defined to be the product of (n + k)(n - k + 1) for all positive integers k and n, which of the following expressions represents k + 1Sn+1 +1?
选项 A、(n + k)(n-k + 2)
B、(n + k)(n-k + 3)
C、(n + k+1)(n-k + 2)
D、(n + k + 2)(n-k+1)
E、(n + k + 2)(n - k + 3)
答案D
解析 Substituting n + 1 for n and k + 1 for k in the definition gives k+1Sn+1 = (n + 1 + k+1)(n + 1-(k+1) + 1)= (n + k + 2)(n-k+1).
The correct answer is D.
转载请注明原文地址:https://kaotiyun.com/show/IttO777K
本试题收录于： GMAT QUANTITATIVE题库GMAT分类
0

GMAT QUANTITATIVE

GMAT

相关试题推荐
随机试题
最新回复(0)