12th Class
Mathematics
Sample Paper
Maths Olympiad Model Test Paper-11
question_answer
If the plane \[2ax-3ay+4az+6=0\] passes through the mid-point of the line joining the centres of the spheres \[~{{x}^{2}}+{{y}^{2}}+{{z}^{2}}-8y+6x-2z=13\] and \[~{{x}^{2}}+{{y}^{2}}+{{z}^{2}}-10x+4y-2z=8,\] then a equals to