SOLUTION: i cant figure out these problems
27. 75 sigma n=21 (2n+5) i solved this problem using the formula Sn=n/2(a1+an) and i got 5454 when the answer in the back was 5555. what did i d
Algebra ->
Sequences-and-series
-> SOLUTION: i cant figure out these problems
27. 75 sigma n=21 (2n+5) i solved this problem using the formula Sn=n/2(a1+an) and i got 5454 when the answer in the back was 5555. what did i d
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