已知x-2y+3z=0,x-3y+4z=0,则x:y:z=
人气:160 ℃ 时间:2019-09-28 10:21:55
解答
由 x - 2y + 3z = 0,得 x = 2y - 3z,①
由 x - 3y + 4z = 0,得 x = 3y - 4z,②
由①②得,2y - 3z = 3y - 4z,得 y = z,③
将③代入①得 x = -z;
所以 x :y :z = -1 :1:1.
当然,x,y,z 不等于0;
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