Engaa help plsss urgent!!!

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This questions from Engaa 2022 section 1 question 29. I’m stuck on it. Plss help

Reply 1

mqb2766

Original post by Fndjdidisjb

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This questions from Engaa 2022 section 1 question 29. I’m stuck on it. Plss help

https://www.undergraduate.study.cam.ac.uk/files/publications/engaa_2022.pdf
Have you covered a geometric series? So 1/4+1/8+1/16 .... Its just an application of that

(edited 6 months ago)

Reply 2

Fndjdidisjb

Original post by mqb2766

https://www.undergraduate.study.cam.ac.uk/files/publications/engaa_2022.pdf
Have you covered a geometric series? So 1/4+1/8+1/16 .... Its just an application of that

Got it. Thnx.
Yh I’ve covered it but didn’t realise that I could do sum to infinity on them separately too.

Reply 3

mqb2766

Original post by Fndjdidisjb

Got it. Thnx.
Yh I’ve covered it but didn’t realise that I could do sum to infinity on them separately too.

If youre unsure, just write out the first few terms of the summation and see what gives. But it should be fairly obvious here that as youre summing sums, you can rearrange it and consider the sum of each geometric series.

(edited 6 months ago)

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Engaa help plsss urgent!!!

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