[(1,-2,3).],[" Find the equation of the plane which is perpendicular to the plane "5x+3y+6z+8=0" and "],[" whish contains the line of intersection of the planes "x+2y+3z-4=0,2x+y-z+5=0" ."],[" Find the equation of the plane through the line of intersection of the planes "],[" Find the equation of the plane through the line of intersection of the origin."],[vec r*(hat i+3hat j)+6=0" and "vec r*(3hat i-hat j-4hat k)=0," which is at a unit distance from the renes "]