Year 12s: what will be the first way you research your future options? >>

Year 12s: what will be the first way you research your future options? >>

Year 12s: what will be the first way you research your future options? >>

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Edexcel A2 C3 Mathematics 12th June 2015

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Original post by tiny hobbit

They wanted integers, so 0.5 won't do. Your answer is correct so far however.

Replace 0.5 with 1/2 then use my previous post.

i still dont understand it, can you show a detailed model answer in your own time please?

Original post by imran_

i still dont understand it, can you show a detailed model answer in your own time please?

Ln 0.5 = ln 1/2 = ln 1 - ln2 (laws of logs)
ln 1 = 0 so ln1 - ln2 = 0 - ln2 = -ln2

So your answer becomes (-ln2) /( -40) which equals ln 2 / 40
This can be written as (1/40) ln 2

Original post by tiny hobbit

Ln 0.5 = ln 1/2 = ln 1 - ln2 (laws of logs)
ln 1 = 0 so ln1 - ln2 = 0 - ln2 = -ln2

So your answer becomes (-ln2) /( -40) which equals ln 2 / 40
This can be written as (1/40) ln 2

Thank you! I understand it now

Hai , in Q3 i put alpha as -26.57 instead of +26.57 , and consquently got the rest of the Q3 answers incorrect. How many marks would i drop?

Hai , in Q3 i put alpha as -26.57 instead of +26.57 , and consquently got the rest of the Q3 answers incorrect. How many marks would i drop?

Original post by WashingPowder

Hai , in Q3 i put alpha as -26.57 instead of +26.57 , and consquently got the rest of the Q3 answers incorrect. How many marks would i drop?

This is last year's thread mate...

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Original post by WashingPowder

Hai , in Q3 i put alpha as -26.57 instead of +26.57 , and consquently got the rest of the Q3 answers incorrect. How many marks would i drop?

Hiya! You can find this years thread here :h:

:h:

I'm going to close this thread now so people don't get confused.

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