Coordinate Method In Space

Answer : A Analysis : This question is intended to help students realize that the equation of a sphere cannot have the product xy or yz or xz in the equation. Options B , C , D are eliminated because they do not satisfy this condition and so of course A is the correct option. Question 4 : ...

The distance from point I to plane Ax + By + Cz+ D = 0 is equal to 3. B 2. CD 7 B 2 C 2 B 2 C 2 2 2 3 2 49 7 A A 2 A 2 6 2 . But = A – 3 B + 2 C + D = 49. Substituting the coordinates of point I into the left sides of the plane equation in each option, only option C satisfies this. Question 27 : ...