SOLUTION: please help me to make n the subject of the formula in: Sn= n/2{2a+(n-1)d}
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Question 1127295: please help me to make n the subject of the formula in: Sn= n/2{2a+(n-1)d}
Answer by josgarithmetic(39615) (Show Source): You can put this solution on YOUR website!
----------(does not render properly using the subscript)...
(dropping subscript also for convenience)
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