Find the nth term from given sum of n term in a series is S_n=n(2n+3)

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The sum of the first n terms of a series is S_n=n(2n+3).
Find the nth term. #GCSE #SAT #EQAO #IBSLmath
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thanks its much more clear than anyone can expect. really really nice presentation ❤❤❤

Emine-riex