# Edexcel A2 C3 Mathematics 12th June 2015Watch

This discussion is closed.
3 years ago
#3701
(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?
0
3 years ago
#3702
(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
0
3 years ago
#3703
(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
0
2 years ago
#3704
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?
0
2 years ago
#3705
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?
0
2 years ago
#3706
(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...

Posted from TSR Mobile
1
2 years ago
#3707
(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 I'm going to close this thread now so people don't get confused.
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