通过点(2，-3，-5)且与平面6x-3y-5z+2＝0垂直的直线为( ) 。A、dfrac (x-2)(6)=dfrac (y+3)(-3)=dfrac (z+5)(-5)B、dfrac (x-2)(6)=dfrac (y+3)(-3)=dfrac (z+5)(-5)C、dfrac (x-2)(6)=dfrac (y+3)(-3)=dfrac (z+5)(-5)D、dfrac (x-2)(6)=dfrac (y+3)(-3)=dfrac (z+5)(-5)

[例6]求过点 (3,1,-2) 且通过直线 dfrac (x-4)(5)=dfrac (y+3)(2)=dfrac (z)(1) 的平面方程.

8.求过点 (3,1,-2) 且通过直线 dfrac (x-4)(5)=dfrac (y+3)(2)=dfrac (z)(1) 的平面方程.

4.已知平面 2x+3y-z+5=0 与直线 dfrac (x-1)(2)=dfrac (y+2)(lambda )=dfrac (z-3)(-5) 平行,则

(9)求过点 (5,-2,3) 且通过直线 dfrac (x-3)(4)=dfrac (y+2)(2)=dfrac (z)(3) 的平面方

直线-1=dfrac (y+3)(-2)=z-4与直线-1=dfrac (y+3)(-2)=z-4的夹角为( )-1=dfrac (y+3)(-2)=z-4-1

3.求通过直线 dfrac (x)(3)=dfrac (y-1)(2)=dfrac (z-2)(1) 且垂直于平面 x+y+z+2=0 的平面方程.

[题目]求过点 (-1,2,3), 垂直于直线-|||-dfrac (x)(4)=dfrac (y)(5)=dfrac (z)(6), 且平行于平面 7x+8y

直线dfrac (x-1)(2)=dfrac (y)(-1)=dfrac (z-2)(3)-|||-__与直线dfrac (x-1)(2)=dfrac (y)(

求过点M(1,0,2)且与直线dfrac (x-2)(2)=dfrac (y-2)(3)=dfrac (z+1)(1)垂直的平面方程求过点M(1,0,2)且与直

直线dfrac (x-1)(1)=dfrac (y)(2)=dfrac (z+3)(-2)-|||-__ __-|||-__与平面dfrac (x-1)(1)=