Sequences

What is the 5th term of the arithmetic sequence 3, 7, 11, 15, ...?

Find the 10th term of the geometric sequence 2, 6, 18, 54, ...

Which of the following sequences is arithmetic?

If the 3rd term of an arithmetic sequence is 17 and the 7th term is 33, find the first term.

Find the sum of the first 20 terms of the arithmetic sequence 7, 10, 13, ...

The nth term of a sequence is given by a_n = 3n^2 + 2. What is the 4th term?

If the sum of the first n terms of a sequence is S_n = n^2 + 2n, find the 5th term.

Find the 8th term of the sequence defined by a_n = 2a_(n-1) + 1 with a_1 = 1.

The sequence 1, 4, 9, 16, ... is given. What type of sequence is this and what is the formula for the nth term?

Find the sum of the first n terms of the geometric sequence where a_1 = 3 and r = 2.