3-d

Question: If the given planes $ax+by+cz+d=0$ and $a'x+b'y+c'z+d'=0$ be mutually perpendicular, then

1) $\frac{a}{a'}=\frac{b}{b'}=\frac{c}{c'}$

2) $\frac{a}{a'}+\frac{b}{b'}+\frac{c}{c'}=0$

3) $aa\,'+\,bb\,'+\,cc\,'+\,dd\,'=0$

4) $aa\,'+\,bb\,'+\,cc\,'=0$

Solution:

Explanation: No Explanation

Plane

Rate this question:

★ ★ ★ ★ ★

Average rating: (0 votes)