已知a满足a²+2a-8=0,求a+1分之1-a²-1分之a+1*a²+2a+1分之a²-2a+1的值已知a满足a²+2a-8=0,求a+1分之1减a²-1分之a+1乘a²+2a+1分之a²-2a+1的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/22 11:11:37
![已知a满足a²+2a-8=0,求a+1分之1-a²-1分之a+1*a²+2a+1分之a²-2a+1的值已知a满足a²+2a-8=0,求a+1分之1减a²-1分之a+1乘a²+2a+1分之a²-2a+1的值](/uploads/image/z/5305494-30-4.jpg?t=%E5%B7%B2%E7%9F%A5a%E6%BB%A1%E8%B6%B3a%26%23178%3B%2B2a-8%3D0%2C%E6%B1%82a%2B1%E5%88%86%E4%B9%8B1-a%26%23178%3B-1%E5%88%86%E4%B9%8Ba%2B1%2Aa%26%23178%3B%2B2a%2B1%E5%88%86%E4%B9%8Ba%26%23178%3B-2a%2B1%E7%9A%84%E5%80%BC%E5%B7%B2%E7%9F%A5a%E6%BB%A1%E8%B6%B3a%26%23178%3B%2B2a-8%3D0%2C%E6%B1%82a%2B1%E5%88%86%E4%B9%8B1%E5%87%8Fa%26%23178%3B-1%E5%88%86%E4%B9%8Ba%2B1%E4%B9%98a%26%23178%3B%2B2a%2B1%E5%88%86%E4%B9%8Ba%26%23178%3B-2a%2B1%E7%9A%84%E5%80%BC)
已知a满足a²+2a-8=0,求a+1分之1-a²-1分之a+1*a²+2a+1分之a²-2a+1的值已知a满足a²+2a-8=0,求a+1分之1减a²-1分之a+1乘a²+2a+1分之a²-2a+1的值
已知a满足a²+2a-8=0,求a+1分之1-a²-1分之a+1*a²+2a+1分之a²-2a+1的值
已知a满足a²+2a-8=0,求a+1分之1减a²-1分之a+1乘a²+2a+1分之a²-2a+1的值
已知a满足a²+2a-8=0,求a+1分之1-a²-1分之a+1*a²+2a+1分之a²-2a+1的值已知a满足a²+2a-8=0,求a+1分之1减a²-1分之a+1乘a²+2a+1分之a²-2a+1的值
a²+2a-8=0
(a+4)(a-2)=0
a=-4 或者 a=2
原式=1/(a+1) - (1+a)/[(a+1)(a-1)] * [(a-1)²]/[(a+1)²]
=1/(a+1) - (a-1)/(a+1)²
=2/(a+1)²
当a=2时,原式=2/9
当a= -4时,原式=2/9