当A为何值时,式子2A+1与A+3得值满足下列条件,(1.相等)(2.互为相反数)
问题描述:
当A为何值时,式子2A+1与A+3得值满足下列条件,(1.相等)(2.互为相反数)
答
1.相等
2A+1=A+3
A=2
-------------------------
2.互为相反数
2A+1=-(A+3)
3A=-4
A=-4/3