Question

Find the sum of the first 12 terms of 4 + 12 + 36 + 108 + …

Answer 1

What do you notice as relation between two successive terms

Answer 2

12/4 = 3
36/12 = 3
108/36 = 3

Answer 3

So the answer would be 3?

Answer 4

Did you add anything? Did you add 12 things?

Answer 5

Im so confused

Answer 6

Read the problem statement. What is it you are supposed to do?

Answer 7

You are supposed to add

Answer 8

But what do I add?

Answer 9

Add the first 12 terms in that series.

4 + 12 + 36 + 108 + …

Add the first 2 terms

4 + 12 = 16

Add the first 3 terms

4 + 12 + 36 = 52

Add the first 4 terms

4 + 12 + 36 + 108 = 160

You have two tasks. What ARE the first 12 terms. and Add them up!

Answer 10

16+52+160=228

Answer 11

Is that correct?

Answer 12

Why are you adding those sums? Find the first 12 terms and add those.

Answer 13

How do i find the first 12 terms?

Answer 14

That is the right question. Go back and read my very first post. That information should tell you how to do it.

Answer 15

Ok i got 2934

Answer 16

Please don't ever do that - just drop numbers. There is just no way for me to know how you obtained that value. Did you copy it out of a book? Did you pull it out of a hat?

How did you get that?

Answer 17

Have you, at any time, studied the "Geometric Series"?

Answer 18

I kept adding dividing by 3 thats how i got it

Answer 19

That's no good.

We have a Geometric Series
First Element is 4
Common Ratio is 3

If this information doesn't mean anything to you, then you are in the wrong class or you have been sleeping or you have read none of your course materials.

Help me out, here. Do you have ANY familiarity with Geometric Series?