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Ghella [55]
3 years ago
5

What's the missing terms 5120, 1280, 320, 80,_, _

Mathematics
1 answer:
Annette [7]3 years ago
6 0
Because 5120 and 1280 are quite large numbers, we can find what is being done in the sequence by looking at 320 and 80, where 320 is being divided by 4. Now that we know that this is process, we can just divide 80 by 4 to get 20, the first missing term, and 20 by 4 to get 5, the second missing term. I hope this helps!
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(b) If a series follows geometric progression, show that the ratio of the sum of term to the sum from (n+1) term to (2n) term is
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Proof with explanation:

We know that the sum of first 'n' terms of a Geometric progression is given by

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Thus the ratio becomes

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