MathematicsEasy249×since 2002Q2580Consider the three planes P₁ : 3x + 15y + 21z = 9, P₂ : x −-− 3y −-− z = 5, and P₃ : 2x + 10y + 14z = 5 Then, which one of the following is true?AP₁ and P₂ are parallel.BP₁, P₂ and P₃ all are parallel.CP₁ and P₃ are parallel.DP₂ and P₃ are parallel.Check answerSkip