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Maths, Addmaths and Statistics: Post your doubts here!

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last post edited. have a look please
ummm ok....it wnt hapnd like thtit wld be like ummmm 5 1o 20 40 80 160.....
here v find the ratio by dividing the term by the term wich is behind it immediatly....
like here 'r' is 20/10=10/5=160/80
n then by using the formula u can find the term...
lets check by finding the 3rd term
ar^(n-1)
5x2^(3-1)
5x2^2
5x4=20

the ratio wld always b constant if differnce is not!

hope it cleard the point....
 
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ummm ok....it wnt hapnd like thtit wld be like ummmm 5 1o 20 40 80 160.....
here v find the ratio by dividing the term by the term wich is behind it immediatly....
like here 'r' is 20/10=10/5=160/80
n then by using the formula u can find the term...
lets check by finding the 3rd term
ar^(n-1)
5x2^(3-1)
5x2^2
5x4=20

the ratio wld always b constant if differnce is not!

hope it cleard the point....
thanksieee! ;)(y)
 
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Lengthy. :(
BAC = 90
Calculate BC using Pythagoras theorem,
Apply sin BCN = BN/BC to get angle BCN (13.8 deg.)

For (ii),
Calculate BD using BD=BN/sin BDN, BD = (164 approx.)
Apply cos DBA = AB/BD (50.8 deg.)

Sorry, couldn't give full solutions, they're lengthy. o_O
its fyn i got the method thnx :)
 
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Is there anything i m missing or CIE made an error:
bullshit.png
4.5km/m/s=1.5 hours?
would not we convert km in meter then divide by speed to get seconds then divide by 60 to get minutes
 
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Is there anything i m missing or CIE made an error:
View attachment 23901
4.5km/m/s=1.5 hours?
would not we convert km in meter then divide by speed to get seconds then divide by 60 to get minutes
Yeah, CIE has made a mistake. :p
You can see the answer, 06 50 can only come if you make the proper conversions (25 min. would come) and then subtract from 07 15.
The examiner would have noted this while checking obviously.
 
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but still they should have rechecked their mistakes we're the one's who wud be effected cux ov it
You do know that CIE is managed and run by HUMANS, don't you? :p
Besides, this is a minor mistake (in the method mark), I've seen mistakes in answers. :p
 
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but still they should have rechecked their mistakes we're the one's who wud be effected cux ov it
Actually no, errors do appear in mark schemes over the years, the examiner doesn't just blindly check the papers, he goes through them and there is obviously a mistake in the MARK SCHEME and not the answers of the candidates. So, don't worry. :)
 
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hmm well thn i dont gv a damn to em :p
Actually no, errors do appear in mark schemes over the years, the examiner doesn't just blindly check the papers, he goes through them and there is obviously a mistake in the MARK SCHEME and not the answers of the candidates. So, don't worry. :)
 
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my answer is correct but A1 can only be given when M1 is given(according to second page of same markschemee)
so?
 
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my answer is correct but A1 can only be given when M1 is given(according to second page of same markschemee)
so?
Actually, you'll get the full marks (unless you don't show proper working), this is because when the answer is correct, the examiner checks the working and marks it. Since, logically and sensibly, our working is CORRECT, we will get the marks. CIE doesn't deprive their candidates of marks this way.
 
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