Explore BrainMass

# Arithmetic Sequence

Not what you're looking for? Search our solutions OR ask your own Custom question.

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

Use the arithmetic sequence of numbers 1, 3, 5, 7, 9,...to find the following:

1. What is d, the difference between any 2 terms

2. Using the formula for the nth term of an arithmetic sequence, what is 101st term?

3. Using the formula for the sum of an arithmetic sequence, what is the sum of the first 20 terms?

4. Using the formula for the sum of an arithmetic sequence, what is the sum of the first 30 terms?

5. What observation can you make about these sums of this sequence? Express your observations as a general formula in "n."

© BrainMass Inc. brainmass.com September 27, 2022, 5:56 pm ad1c9bdddf
https://brainmass.com/math/algebra/arithmetic-sequence-120467

#### Solution Preview

Use the arithmetic sequence of numbers 1, 3, 5, 7, 9,...to find the following:

a) What is d, the difference between any 2 terms?

Just subtract one number from the previous one.....d = 2.

b) Using the formula for ...

\$2.49