Find the 25th term of the arithmetic sequence

-7, - 4, - 1, 2, ...

2. In an arithmetic sequence, if a4 = 18 and a10 = 30, determine a1, d, and an.

Then write the first four terms of the sequence.

3. In a geometric sequence, if a3 = - 5 and a6 = 40, determine a1, r, and an.

Then write the first three terms of the sequence.

Question

Mathematics

Kaitlynn

9 August, 05:24

Find the 25th term of the arithmetic sequence

-7, - 4, - 1, 2, ...

2. In an arithmetic sequence, if a4 = 18 and a10 = 30, determine a1, d, and an.

Then write the first four terms of the sequence.

3. In a geometric sequence, if a3 = - 5 and a6 = 40, determine a1, r, and an.

Then write the first three terms of the sequence.

+4

Answers (1)

Know the Answer?

Dane · Answer 1

1.) It seems that sequence just depends on adding 3 to get the next term.

The 25th term is 65

2.) a1 equals 12

first 4 terms are 12, 14, 16, 18

3.) Couldn't figure that one.