# AP - general term

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

## Correct answer:

Tips for related online calculators

Need help calculating sum, simplifying, or multiplying fractions? Try our fraction calculator.

### You need to know the following knowledge to solve this word math problem:

## Related math problems and questions:

- Parabolic sequence

Find the sum of the first nine terms of an arithmetic sequence whose general term is a(n) = 3n²+5 - 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? - The common difference 2

Find the common difference of an arithmetic progression (AP), whose first term is 5 and sum of its first 4 terms is half the sum of the next four terms. - In a GP 72+144

In a GP, the sum of the 2nd and fifth terms is 72, and the sum of the 3rd and 6th terms is 144. Find the common ratio, find the first term, and find the sum of the first six terms

- 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. - 6 terms

Find the first six terms of the sequence. a1 = 7, an = an-1 + 6 - The sum 23

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?