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Simplification

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For the above step, i couldnt get why the top(1) equals the bottom (2).

From (1) i changed "2/k (k-1) " to "(2- 2/k) ".
But (2) seems to have just used "2/k" instead of "(2- 2/k)" which i thought should be so.

Is the answer given correct? (Are my doubts valid?)
Reply 1
Original post by Vadevalor
ImageUploadedByTapatalk1416721607.520663.jpg

For the above step, i couldnt get why the top(1) equals the bottom (2).

From (1) i changed "2/k (k-1) " to "(2- 2/k) ".
But (2) seems to have just used "2/k" instead of "(2- 2/k)" which i thought should be so.

Is the answer given correct? (Are my doubts valid?)


The summations are correct

(1-p)k-2 = (1-p)k/(1-p)2

so the factorised out the 2p2 and the denominator of the above as they have no k dependence

then multiplied out and split ....
(edited 9 years ago)
Reply 2
Original post by TeeEm
The summations are correct

(1-p)k-2 = (1-p)k/(1-p)2

so the factorised out the 2p2 and the denominator of the above as they have no k dependence

then multiplied out and split ....




Thanks for the reply! But my concern is the original "k-1" seem to have became "2" which doesnt seem logical
Reply 3
Original post by Vadevalor
Thanks for the reply! But my concern is the original "k-1" seem to have became "2" which doesnt seem logical


they have multiplied out
Reply 4
I see it now thanks!
Reply 5
Original post by Vadevalor
I see it now thanks!


you are welcome

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