Mathematics, 18.10.2020 02:01, L3Zenith

Find the specified sum for each arithmetic series. 1. 2+5+ 8 +..; S7
2. (-15) + (-10) + (5) +...;S6
3. a1 =9, d=4 ; S5
4. a=32, d= -3 ; S6
5. 4+11 + 18+...; S10

(with solutions)

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Find the specified sum for each arithmetic series. 1. 2+5+ 8 +..; S7
2. (-15) + (-10) + (5) +....