解方程组 (-2-a)²+(4-b)²=r² (-1-a)² +解方程组 (-2-a)²+(4-b)²=r² (-1-a)² + (3-b)²=r² (2-a)²+(6-b)²=r²
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 03:16:41
![解方程组 (-2-a)²+(4-b)²=r² (-1-a)² +解方程组 (-2-a)²+(4-b)²=r² (-1-a)² + (3-b)²=r² (2-a)²+(6-b)²=r²](/uploads/image/z/4316541-69-1.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%84+%EF%BC%88%EF%BC%8D2-a%EF%BC%89%26%23178%3B%EF%BC%8B%EF%BC%884%EF%BC%8Db%EF%BC%89%26%23178%3B%3Dr%26%23178%3B+%EF%BC%88%EF%BC%8D1-a%EF%BC%89%26%23178%3B+%2B%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%84+%EF%BC%88%EF%BC%8D2-a%EF%BC%89%26%23178%3B%EF%BC%8B%EF%BC%884%EF%BC%8Db%EF%BC%89%26%23178%3B%3Dr%26%23178%3B+%EF%BC%88%EF%BC%8D1-a%EF%BC%89%26%23178%3B+%2B+%EF%BC%883%EF%BC%8Db%EF%BC%89%26%23178%3B%3Dr%26%23178%3B+%EF%BC%882%EF%BC%8Da%EF%BC%89%26%23178%3B%EF%BC%8B%EF%BC%886%EF%BC%8Db%EF%BC%89%26%23178%3B%3Dr%26%23178%3B)
解方程组 (-2-a)²+(4-b)²=r² (-1-a)² +解方程组 (-2-a)²+(4-b)²=r² (-1-a)² + (3-b)²=r² (2-a)²+(6-b)²=r²
解方程组 (-2-a)²+(4-b)²=r² (-1-a)² +
解方程组 (-2-a)²+(4-b)²=r² (-1-a)² + (3-b)²=r² (2-a)²+(6-b)²=r²
解方程组 (-2-a)²+(4-b)²=r² (-1-a)² +解方程组 (-2-a)²+(4-b)²=r² (-1-a)² + (3-b)²=r² (2-a)²+(6-b)²=r²
(-2-a)^2+(4-b)^2=r^2
(2+a)^2+(4-b)^2=r^2.(1)
(-1-a)^2+(3-b)^2=r^2
(1+a)^2+(3-b)^2=r^2.(2)
(2-a)^2+(6-b)^2=r^2.(3)
(1)-(2):(2+a+1+a)(2+a-1-a)+(4-b+3-b)(4-b-3+b)=0
3+2a+7-2b=0
a-b=-5.(4)
(1)-(3):(2+a+2-a)(2+a-2+a)+(4-b+6-b)(4-b-6+b)=0
8a-20+4b=0
2a+b=5.(5)
(4)+(5):3a=0
a=0
代入(4):0-b=-5
b=5
代入(1):r^2=(2+0)^2+(4-5)^2=5
r=√5