1.

If x=a+ar+ar2+⋯∞, y=b−br+br2−⋯∞ and z=c+cr2+cr4+⋯∞ for |r|>1, then the value of xyz is

Answer»

If x=a+ar+ar2+, y=bbr+br2 and z=c+cr2+cr4+ for |r|>1, then the value of xyz is



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