how many terms of gp 3,3^2,3^3............are needed to give the sum 120

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Gurmail Singh
Oct. 15, 2017, 5:30 p.m.

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Anubhav Singh's image
Anubhav Singh
Oct. 16, 2017, 11:45 p.m.

IMG_20171016_234510.jpgGood Luck.

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