Mathematics, 28.03.2021 17:00 kev9369

Prove Without using a fora mula that the sum , Sn of the series a² + (ar)² + for n terms is given by :

Sn = a²(1-r\n)(1+r\n) / (1+r)(1-r)

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Prove Without using a fora mula that the sum , Sn of the series a² + (ar)² + for n terms is given b...