Find the 8th term in the expansion of (2x - y)12. The sum of the first 20 terms of an arithmetic series is 45. The sum of the first 40 terms of the series is 290. Find the first term and the common difference of the series. Hence, find the seventh term of the series. Find the 9th term and the sum of the first 9th term of the following geometric sequence. 7, -14, 28, ...

Q: Find the sum of the infinite geometric series (if possible). -125, -25, -5, -1... 544 625 4 No Sum -…

A: -125,-25,-5,-1,............  a1=-125 a2=-25 a3=-5 Common ratio is given as r=a2a1=a3a2 r=-25-125…

Q: 6. +.. Find S9. 4 + 12 + 36

A: Solve for the S9

Q: Find a formula for the nth term of the sequence. - 6, - 4, - 2, 0, 2, . (every other integer…

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Q: Match the terms on the left with the formulas on the right. nth term of an arithmetic sequence nth…

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Q: Find a formula for the general term an of the sequence assuming the pattern of the first few terms…

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Q: Find the arithmetic series of the arithmetic sequence (1, 2, 3, ., 250}. a 31,375 b 31,250 31,125 d.…

A: Given arithmetic sequence is  ={1,2,3,....,250} Formula of sum of arithmetic series is  =(n/2)(a+l),…

Q: th Find the n"" term of the arithmetic sequence whose initial term is a, and common difference is d.…

A: The nth term of an arithmetic progression is  an= a+(n-1)*d