2. 外语
  3. 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=

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=

admin2021-10-21  54
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://www.kaotiyun.com/show/Q3tO777K
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)