Mathematics, 23.04.2021 20:20 tonio638
PLEASE HELP!! WILL MARK BRAINLIEST!
4. Find the sum of the first 21 terms in a series where a = 20 and ![t_{21}[/tex = 400. 5. Find the sum of the first 100 terms in a series where a = 0 and [tex]t_{100}](/tpl/images/2310/4319/88669.png)
= 99.
6. Find the sum of the first 50 terms in a series where a = 4 and 
= 196.
7. Find the sum of the first 100 terms in a series where a = 0 and 
= 99.
8. Find the sum of the first 10 terms in an arithmetic series where 
= 7 and 
= 13.
9. Find the sum of the first 10 terms in an arithmetic series where 
= 15 and = 45.
10. Find the sum of the first 30 positive multiples of 5.
Part B
Directions: Now, find n and Sn for each of the following arithmetic series below.
11. 5 + 11 + 17 + 23 + …+ 101
12. 2 + 4 + 6 + 8+ …+ 60
13. 46 + 43 + 40 + …+ 16
Answers: 3
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PLEASE HELP!! WILL MARK BRAINLIEST!
4. Find the sum of the first 21 terms in a series where a = 20...
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