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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Question 134757This question is from textbook merrill algebra 2 with trigonometry applications and connections
: 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 do wrong
31. d=5, n=16, an=72 find Sn for the sequence
how do you get a1
help me solve these plese
This question is from textbook merrill algebra 2 with trigonometry applications and connections
Answer by vleith(2983) (Show Source): You can put this solution on YOUR website!
Don't know on the first one,
but to get the a1 in the second one 72 = a1 + (n-1)d
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