The 7th term in an arithmetic sequence is 17 and the 50th term is 123. What is the sum of all the terms from the 7th term

Question

The 7th term in an arithmetic sequence is 17 and the 50th term is 123.
What is the sum of all the terms from the 7th term through the 50th term (including the 7th and 50th terms)?
Starting with the 1st term - what is the sum of the first 50 terms?

Kunduz · Accepted Answer

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