U={2,3,a²+2a-3},A={|a+1|,2},CuA={5},求实数a.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/02 07:19:54
![U={2,3,a²+2a-3},A={|a+1|,2},CuA={5},求实数a.](/uploads/image/z/3938852-20-2.jpg?t=U%3D%EF%BD%9B2%2C3%2Ca%26%23178%3B%2B2a-3%EF%BD%9D%2CA%3D%EF%BD%9B%7Ca%2B1%7C%2C2%EF%BD%9D%2CCuA%3D%EF%BD%9B5%EF%BD%9D%2C%E6%B1%82%E5%AE%9E%E6%95%B0a.)
U={2,3,a²+2a-3},A={|a+1|,2},CuA={5},求实数a.
U={2,3,a²+2a-3},A={|a+1|,2},CuA={5},求实数a.
U={2,3,a²+2a-3},A={|a+1|,2},CuA={5},求实数a.
根据题意得
|a+1|=3 且a²+2a-3=5
∴a=2或-4 a=-4或a=2
∴a=2或a=-4