化简得 6a b 6c 6a b 6c ,b于 1 6t 代入体积式 1111 .1= 6 6t t 6t ∴.a=1,b=6,c=1, 所求平面方程为6x+y+6z=6., 6 1 1 6 1 a b c 化简得 = = 令 t a b c = = = 6 1 1 6 1 , 6 1 t  a = , 1 t b = , 6 1 t c = t t 6t 1 1 6 1 6 1 1 =    代入体积式 , 6 1  t = a = 1, b = 6, c = 1, 所求平面方程为 6x + y + 6z = 6