(a-b):(a+b)=-2:7
7a-7b=-2a-2b
9a=5b
a:b=5:9,a=5b/9 --------(1)
(a-b):(c-b)=-2:1
a-b=-2c+2b
3b-a=2c 将a=5b/9 代入,得
3b-5b/9=2c
b:c=9:11 -----------(2)
结合(1)(2),a:b:c=5:9:11
因为5²+9²=106
(a-b):(a+b)=-2:7
7a-7b=-2a-2b
9a=5b
a:b=5:9,a=5b/9 --------(1)
(a-b):(c-b)=-2:1
a-b=-2c+2b
3b-a=2c 将a=5b/9 代入,得
3b-5b/9=2c
b:c=9:11 -----------(2)
结合(1)(2),a:b:c=5:9:11
因为5²+9²=106