Edexcel math q

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Htx_x346
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Skiwi
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(Original post by Htx_x346)
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What have you tried so far?

When a question shows a series evaluates to a simple result i tend to write out the first few terms and try to spot a pattern
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Htx_x346
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(Original post by Skiwi)
What have you tried so far?

When a question shows a series evaluates to a simple result i tend to write out the first few terms and try to spot a pattern
I tried that but i couldn’t spot anything
Esp since the first few values are decimals
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Skiwi
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(Original post by Htx_x346)
I tried that but i couldn’t spot anything
Esp since the first few values are decimals
I would keep the results for each n term in log form, makes it easier to spot stuff.
Do you know any log rules that could apply here that may make things cancel out?
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Htx_x346
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(Original post by Skiwi)
I would keep the results for each n term in log form, makes it easier to spot stuff.
Do you know any log rules that could apply here that may make things cancel out?
Yeah so the first few terms cancel out
Im letft with-log base 5 of 2
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Skiwi
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(Original post by Htx_x346)
Yeah so the first few terms cancel out
Im letft with-log base 5 of 2
Double check if everything cancels out towards the end of the series
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Htx_x346
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(Original post by Skiwi)
Double check if everything cancels out towards the end of the series
TYSM
Ive never seen a question like that before
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(Original post by Htx_x346)
TYSM
Ive never seen a question like that before
Np, it's the type of problem that is very easy once you know how to approach.

If you do FM then i've seen a similar type of question in methods of differences. You have to spot the fact you separate the logarithm out and then apply the method of differences.
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