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Prove that the lines x=py+q,z=ry+s and x=p'y+q',z=r'y+s' are perpendicular, if pp'+n'+1=0.

Answer»

Prove that the lines x=py+q,z=ry+s and x=p'y+q',z=r'y+s' are perpendicular, if pp'+n'+1=0.



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