(series) can someone explain this question | Revision Server | Page 1

hard oasis Dec 25, 2024, 4:42 PM

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bwaysically

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you can split the sum into 3 sums

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apply the standard summations

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and equate that to n(n+1)(n+2)(4n-5)

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and compare coeffs

sacred mountain Dec 25, 2024, 4:44 PM

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hard oasis and compare coeffs

ive tried its not working

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can you show me ur working out

hard oasis Dec 25, 2024, 4:45 PM

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lemme try it

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@sacred mountain

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i got some values idk if they're right tho

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A = 16, B = -28/3 C = -152/9

sacred mountain Dec 25, 2024, 4:54 PM

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thats the answer

hard oasis Dec 25, 2024, 4:54 PM

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oh wait

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idk why i said 3 x 1/12 is 4/12

sacred mountain Dec 25, 2024, 4:57 PM

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can i see ur working out

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there is a working out provided but it dont make sense

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to me

hard oasis Dec 25, 2024, 5:04 PM

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@sacred mountain

sacred mountain Dec 25, 2024, 5:13 PM

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hard oasis

can you explain this onwards for me

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i dont get that part

hard oasis Dec 25, 2024, 5:13 PM

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ive just compared the coefficients on each side

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if the coeff of n^2 is A/4 on the LHS, and 4 on the RHS

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then A/4 = 4

sacred mountain Dec 25, 2024, 5:16 PM

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hard oasis then A/4 = 4

sos i still dont get it

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how did you get A/4 = 4

hard oasis Dec 25, 2024, 5:20 PM

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see this

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coefficient of n^2 in LHS = A/4 right

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coefficient of n^2 in RHS = 4

sacred mountain Dec 25, 2024, 5:32 PM

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oohhhh

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alrr

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yh

#(series) can someone explain this question