The sum of the first 4 terms of an arithmetic sequence is 336 and the sum of the first 12 terms is 816.
a. Find the general term of the arithmetic sequence.
b. Find the sum from the 20th term to the 30th term.
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Answer:
a= 567
b= 20jjejwjjwjiiqoi bejwiiiwiqkjiix
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Answer:
plh is a very GOOD thing a
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