- #1

- 17

- 0

the sequence given is 2, 4, 8, 16, 32 ......

It wants you to find the sum from 1-50

So the equation thing is 2^N?

How do you find all the sums again...? Thanks

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter reliquator
- Start date

- #1

- 17

- 0

the sequence given is 2, 4, 8, 16, 32 ......

It wants you to find the sum from 1-50

So the equation thing is 2^N?

How do you find all the sums again...? Thanks

- #2

Tide

Science Advisor

Homework Helper

- 3,089

- 0

[tex]S = 2 + 2^2 + \cdot \cdot \cdot + 2^{50}[/tex]

If you multiply the sum by 2 you get

[tex]2S = 2^2 + 2^3 + \cdot \cdot \cdot + 2^{50} + 2^{51}[/tex]

What happens when you subtract the first equation from the second? Can you determine from that what the sum is?

- #3

- 13,112

- 663

[tex] S=\sum_{k=1}^{50} 2^{k} =...? [/tex]

, i guess the notation shouldn't be too difficult to grasp.

I hope.

Daniel.

Share: