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Let \( {S}_{n} \)denote the sum of first \( n \)terms of an A.P. If \( {S}_{2n}=3{S}_{n}, \)then find the ratio \( {S}_{3n}/{S}_{n}\).

Answer

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Solution

Solution for Let  {S}_{n} denote the sum of first  n terms of an A.P. If  {S}_{2n}=3{S}_{n}, then find the ratio  {S}_{3n}/{S}_{n}.
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