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- Question 23 and 24, Exercise 4.3
- ** Solution. ** From the statement, we have the following series: $$ 14+16+18+...+a_{25}.$$ This is arithme... ** Solution. ** From the statement, we have the following series: $$ 50+49+48+...+6.$$ This is arithmetic s
- Question 25 and 26, Exercise 4.3
- ** Solution. ** From the statement, we have the following series: $$ 6000+70,000+...+a_{20}.$$ This is arit... ** Solution. ** From the statement, we have the following series: $$ 500+550+600+...+a_{31}.$$ This is arit
- Question 9 and 10, Exercise 4.1
- $$a_n = (-1)^{n+1}(3n - 5).$$ we can compute the following terms: \begin{align*} a_1 &= (-1)^{1+1}(3(1) - 5)