Maths, Addmaths and Statistics: Post your doubts here!

[Abdul96]

Which calculator is allowed officially in Cie Add.Maths Examinations...???

 

[ayeshaddy]

Assalam o alaikum! I'm interested in doing Add Maths, on my own as I can't have tutions or anything else here. So is it like possible? Me studying through internet and books all on my own?

 

[ayeshaddy]

Assalam o alaikum! I'm interested in doing Add Maths, on my own as I can't have tutions or anything else here. So is it like possible? Me studying through internet and books all on my own?

 

[***amd***]

Assalam o alaikum! I'm interested in doing Add Maths, on my own as I can't have tutions or anything else here. So is it like possible? Me studying through internet and books all on my own?

i dont think its poossible, cuz it is a higher level maths.. u will get all confused.

 

[funky brat]

Someone please tell me what is upper bound and lower bound and how do you calclulate it?
P.S. Is this topic anywhere in the Ds?

 

[Uniquely Beautiful]

Someone please tell me what is upper bound and lower bound and how do you calclulate it?
P.S. Is this topic anywhere in the Ds?

its in Book 4 addendum..chapter 1

 

[funky brat]

its in Book 4 addendum..chapter 1

Thanks

 

[Uniquely Beautiful]

Thanks

ur welcome :')

 

[Lilly2318]

After the initiative taken by Math_angel in the IGCSE section, I have made this topic for students of O'levels. You can post any question or any problem here and me along with other XPF users will try to help you as soon as possible. This topic is a feasible option as it won't bring a hassle of making new topics for every question and it will also allow the helpers to not miss any of your questions and have one common topic for answering your Mathematics queries.

So start posting your problems.

heres my prob: the Q is
8 – 3t > 14 + t
my answer is not right and the anser in marking scheme is written as (t) < –1.5, –1 1/2, or -3/2.
please explain the procedure...

 

[funky brat]

heres my prob: the Q is
8 – 3t > 14 + t
my answer is not right and the anser in marking scheme is written as (t) < –1.5, –1 1/2, or -3/2.
please explain the procedure...

See, this is easy.
8-3t>14+t
8>14+t+3t
8>14+4t
8-14>4t
-6>4t
-6/4>t
-3/2 or -1.5>t

 

[funky brat]

Somebody help me with this please. It's a fairly simple question and despite applying the correct formula, I don't seem to get the answer right.
Section B, Question 8(a)
http://papers.xtremepapers.com/CIE/...Calculator Version) (4024)/4024_s12_qp_22.pdf

 

[***amd***]

Somebody help me with this please. It's a fairly simple question and despite applying the correct formula, I don't seem to get the answer right.
Section B, Question 8(a)
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s12_qp_22.pdf

apply cosine rule on it.
and then you get 128.39something.
OW YEAH! me rox

 

[Lilly2318]

thynx

See, this is easy.
8-3t>14+t
8>14+t+3t
8>14+4t
8-14>4t
-6>4t
-6/4>t
-3/2 or -1.5>t

thnx

 

[***amd***]

See, this is easy.
8-3t>14+t
8>14+t+3t
8>14+4t
8-14>4t
-6>4t
-6/4>t
-3/2 or -1.5>t

hey! but how do we get -11/2?

 

[Lilly2318]

no thats 1 and then 1/2..in mixed numbers

 

[***amd***]

no thats 1 and then 1/2..in mixed numbers

ok

 

[funky brat]

apply cosine rule on it.
and then you get 128.39something.
OW YEAH! me rox

I did that like thrice but I'm not getting the correct answer, mind doing that for me?

 

[***amd***]

I did that like thrice but I'm not getting the correct answer, mind doing that for me?

must be some calculation error.
21.3 (squared) = 20 (squared) + 2 (squared) - 2*20*2*cos.AngleABC
453.69 = 404 - 80*cos.AngleABC
453.69 - 404 = - 80*cos.AngleABC
AngleABC = cos^-1 (-49.69/80)
AngleABC = 128.39

 

[funky brat]

must be some calculation error.
21.3 (squared) = 20 (squared) + 2 (squared) - 2*20*2*cos.AngleABC
453.69 = 404 - 80*cos.AngleABC
453.69 - 404 = - 80*cos.AngleABC
AngleABC = cos^-1 (-49.69/80)
AngleABC = 128.39

Thanks, I guess. But my dheet calculator still gives 51 as the answer

 

[***amd***]

Thanks, I guess. But my dheet calculator still gives 51 as the answer

u r most welcome.
and u better check out its mode, or simply reset it.

 

[***amd***]

Thanks, I guess. But my dheet calculator still gives 51 as the answer

u r most welcome.
and u better check out its mode, or simply reset it.