The sum of the first three terms of two series, one in A.P. and the other in G.P. is the same. If the first term of both series is 2/3, and the common difference of the A.P. and the common ratio of the G.P is equal. Find the sum of first 20 terms of the AP.
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apni ga●●d me daal ye ap gp is 1by2 by why
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