Question

Sigma notation help please?

Answer 1

Use sigma notation to write the sum:
[1 - (2/n - 1)^2](2/n) + ... + [1 - (2n/n - 1)^2](2/n)

Answer 2

[1 - (2/n - 1)^2](2/n)
and
[1 - (2n/n - 1)^2](2/n)
are different equations... are they suppose to be?

Answer 3

Yes.

Answer 4

I am super confused on how to do this.

Answer 5

i'll try and help ^_^

so, lets look at the first part only,
can you turn
[1 - (2/n - 1)^2](2/n) + ...
into sigma notation?

Answer 6

I don't know how.

Answer 7

@DemolisionWolf

Answer 8

[1 - (2/n - 1)^2](2/n)

\[\sum_{n=1}^{\infty} \frac{2(1 - (\frac{2}{n} - 1)^2)}{n}\]

Answer 9

@DemolisionWolf Is that the whole thing or just the first part?

Answer 10

to be honest, i'm not 100% sure on all of this, but that is what I would put as my answer.

Answer 11

Okay thankyou!