MathematicsEasy249×since 2002Q2388If the plane 2ax−3ay+4az+6=02ax-3ay+4az+6=02ax−3ay+4az+6=0 passes through the midpoint of the line joining the centres of the spheres x2+y2+z2+6x−8y−2z=13{x^2} + {y^2} + {z^2} + 6x - 8y - 2z = 13x2+y2+z2+6x−8y−2z=13 and x2+y2+z2−10x+4y−2z=8{x^2} + {y^2} + {z^2} - 10x + 4y - 2z = 8x2+y2+z2−10x+4y−2z=8 then a equals :A−1-1−1B111C−2-2−2D222Check answerSkip