
求解一道英文数学题,谢谢!
Find"a"theidentityelementand"b"inversefortheoperationdefinedas"a*b=a+b+2"星号不是乘号····...
Find "a" the identity element and "b" inverse for the operation defined as "a*b=a+b+2"星号不是乘号····
展开
展开全部
令a+b+2=a得b=-2,所以-2是单位元
ab=a+b+2=-2,b=-4-a,所以a的逆元为-4-a
ab=a+b+2=-2,b=-4-a,所以a的逆元为-4-a
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询