# The common difference

Find the common difference of an arithmetic progression (AP), whose 1st term is 5 and the sum of its 1st 4 terms is half the sum of the next four terms .

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## Related math problems and questions:

- AP - general term

Find the sum of the first 12 terms of the arithmetic sequence whose general term is an=3n+5. - Common difference

The 4th term of an arithmetic progression is 6. Find the common difference if the sum of the 8th and 9th terms is -72. - The sum 39

The sum of the first six terms of the arithmetic sequence is 72, and the second term is seven times the fifth term. Find the first term and the AP difference. - Common difference 2

What is the common difference of the arithmetic sequence with 20 terms, whose first term is 5a+b and the last term is 43a+20 b?

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The sum of the first 10 terms of an arithmetic sequence is 530. What is the first term if the last term is 80? What is the common difference? - Parabolic sequence

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The product of the third and second terms of the arithmetic progression is 3000. If the common difference is 10, find the first term.