Question

the sun of n term of the series 5/2 -1+2/5-....​

Answer 1

Answer:

Step-by-step explanation:

3=A1

and 2%2A%288%2F2%29%283%2BA%5B1%5D%2B%288-1%29d%29=%285%2F2%29%283%2BA%5B1%5D%2B%285-1%29d%29----this is just an exact transcription of the worded description, using formula for sum of arithmetic sequence.

8%283%2B3%2B7d%29=%285%2F2%29%283%2B3%2B4d%29

8%286%2B7d%29=%285%2F2%29%286%2B4d%29

 

8%2A6%2B8%2A7d=15%2B10d

48%2B46d=15

46d=15-48

46d=-33

highlight%28d=-33%2F46%29