the third term of an ap is 7 and the seventh terms is two more than three time the third term.find the first term, common difference and the sum of 20 terms
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find the rth term of an AP ,sum of whose first n term is 2n+3n^2
find the rth term of an AP ,sum of whose first n term is 2n+3n^2
find the rth term of an AP ,sum of whose first n term is 2n+3n^2
find the rth term of an AP ,sum of whose first n term is 2n+3n^2
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