Can someone help explain this questions (series) | Revision Server | Page 1

vagrant scaffold Dec 24, 2024, 5:38 PM

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Can someone help explain this questions (series)

dire anvil Dec 24, 2024, 5:41 PM

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Look for the pattern between each part of the terms

vagrant scaffold Dec 24, 2024, 5:41 PM

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idk whats the pattern

dire anvil Dec 24, 2024, 5:42 PM

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5 11 17 23
3 7 11 15

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Consider them seperately

vagrant scaffold Dec 24, 2024, 5:42 PM

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6 and 4

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what abt them

dire anvil Dec 24, 2024, 5:42 PM

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Right

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What's the nth term of each list

vagrant scaffold Dec 24, 2024, 5:43 PM

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6n-1 and 4n-1

dire anvil Dec 24, 2024, 5:43 PM

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So the general form is
(6r-1) x (4r-1)

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It's the sum of that up to n

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Expand the brackets and use standard summation formulae

vagrant scaffold Dec 24, 2024, 5:44 PM

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ohh alr

#Can someone help explain this questions (series)