2. 职称英语
  3. For all integers a and b, the operation@is defined as a@b=(-a+b)(b+a). If a=2 an

For all integers a and b, the operation@is defined as a@b=(-a+b)(b+a). If a=2 an

游客2025-02-27  17
问题 For all integers a and b, the operation@is defined as a@b=(-a+b)(b+a). If a=2 and b=5, then b@a=
选项 A、25
B、-21
C、7
D、21
E、25
答案 B
解析 5@2=(-5+2)(2+5)=-21
转载请注明原文地址:https://tihaiku.com/zcyy/3974778.html
相关试题推荐
随机试题
最新回复(0)