Question

Find S25 for 1/2 + 1 + 3/2 + 2 +...
A. 160
B. 162
C. 160.5
D. 162.5

Answer 1

Do you know if its arithmetic or Geometric? Which do you think it is?

Answer 2

If its Arithmetic, find d(common difference)

If its Geometric, find r(common ratio)

Answer 3

hmmm @chicagoblkhaks we cant proceed if you dont reply also lol

Answer 4

sorry, im in a haystack of homework. but im not sure how to find these ones.

Answer 5

1/2 + x = 1

Solve for x.

Answer 6

x = 1/2

Answer 7

1 + x = 3/2

Solve for x.

Answer 8

3/2 + x = 2

Solve for x.

Answer 9

Yes, x = 1/2

Answer 10

So:

First term in the sequence: 1/2

1/2 + 1/2 = 1 <--- Second term in the sequence

1 + 1/2 = 3/2 <--- Third term in the sequence

3/2 + 1/2 = 2 <---- Fourth term in the sequence

Answer 11

okay so how do i keep that going to figure out the answer. cause my choices are all super high compare to that lol

Answer 12

so is it a arithmetic sequence or geometric sequence?

As you see, it increases by + 1/2

Answer 13

i guess im not sure?

Answer 14

is that considered a difference or a ratio/