1.

If S_(1),S_(2),S_(3),…S_(n) be the sums of those G.P. whose first terms are 1, 2, 3, …, n respectively and common ratios are (1)/(2),(1)/(3),(1)/(4),…,(1)/(n+1),then prove that : S_(1)+S_(2)+S_(3)+…+S_(n)=(1)/(2)n(n+3)

Answer»

SOLUTION :N/a


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