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# Urgent Help Exam tomorrow Mourning

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1. http://store.aqa.org.uk/qual/gce/pdf...W-QP-JAN10.PDF
http://store.aqa.org.uk/qual/gce/pdf...W-MS-JAN10.PDF

Q8B
I don't get how on the MS they say

Can you explain ?
2. omega is a root of so so the above is obviously true.

To get to that, you need to use the Geometric progression sum to N terms formula (in the formula book)
3. You need to figure out that it is a geometric series.

Good luck for the exam.
4. (Original post by yclicc)
omega is a root of so so the above is obviously true.

To get to that, you need to use the Geometric progression sum to N terms formula (in the formula book)

(Original post by raheem94)
You need to figure out that it is a geometric series.

Good luck for the exam.
Thnx, I got how we got it, I just didn't see how it equaled 0, but I should have seen w^7 = 1 thus numerator = 0.

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