Mathematics: Post your doubts here!

[CaptainDanger]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

 

[student92]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

in igcse compound interst can be calculated by the formula A= P(1+r/100)to the power of n where a is amount, p princple, r rate and n number of years?
i have heard in igcse you should not use this formula and instead calucate interest one by one for each year by the simple interst formula of PRT *100
please help me out

 

[XPFMember]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Assalamoalaikum!!

i dont think that matters...i've been doing questions based on that formula...and if that was the case my teacher wud've told us....my teacher was really great

 

[Nibz]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

in igcse compound interst can be calculated by the formula A= P(1+r/100)to the power of n where a is amount, p princple, r rate and n number of years?
i have heard in igcse you should not use this formula and instead calucate interest one by one for each year by the simple interst formula of PRT *100
please help me out

Yes, you cannot use that 'Compound Interest' formula in IGCSE. (In O-level, you can)
You can apply only those formulae in the paper which are mentioned in the syllabus; and this P(1 + r/100)^n is not there in IGCSE syllabus!

 

[XPFMember]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

assalamoalaikum!!

really?? i dont think so..that ur marks will be deducted if u use it...showing how u did it clearly..

cuz they accept answers which ever method used...as far as it is correct...even if nt mentioned in the mark scheme :unknown:

 

[student92]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

manth angel did you give o level, because my teacher did tell us not to use, but i thought its not possible , we can use it because what you are sayingis correct, show the correct answer by any method . thanks to all

 

[XPFMember]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

no i've done igcse ....but my teacher didnt tell us that we shudnt use it..i suggest one thing...just check which year this question came in and check what the mark scheme says...

 

[Nibz]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

assalamoalaikum!!

really?? i dont think so..that ur marks will be deducted if u use it...showing how u did it clearly..

cuz they accept answers which ever method used...as far as it is correct...even if nt mentioned in the mark scheme :unknown:

Mark-scheme and syllabus are both different things!
Plus, exceptions are there!
And this 'Compound Interest' drama is a pretty old one! I've heard many people (teachers mainly) saying this!

 

[XPFMember]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

..well i dont think we'll be penalised for that...but i guess we arent expected to learn it!!

 

[student92]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

16. Personal and household finance
Core
Use given data to solve problems on personal and
household finance involving earnings, simple interest and
compound interest (knowledge of compound interest
formula is not required), discount, profit and loss; extract
data from tables and charts.
from the 2011 syllabus for 0580 page14
it says not required it does not say dint use it.
i think you can use it but if the answer is not correct you will get 0, no marks for working, i guess

 

[Nibz]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Look, they won't ask you to find the compound interest for 20 years or 20,000000000000000 million years!
Rather they will only ask you to find it for like (maximum) 3 - 4 years! Why take risk then!

 

[XPFMember]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

yeah that's right
haan then if u want u can use the formula to confirm ur answer

actually what i used to do is use the formula...but i always actually messed up wid the formula...so to confirm in the end i wud do this way on the calculator...to confirm i've put up the formula correctly

but i think u need to do the other way

 

[student92]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

ok thanks alot, i get it, why take the risk calculate one by one, and for the sequence questions, same thing rieght?
dont right the formula i mean the first term+(n-1) *first difference

 

[XPFMember]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

that one's fine i think...but no need to go for those complex ones

 

[student92]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

acha leave all this, on2005 p2 q7 part b what is this< cant understand a bit. please help
http://www.xtremepapers.me/CIE/Cambridg ... 5_qp_2.pdf

 

[XPFMember]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

assalamoalaikum once again!!

well remember one thing...when u r given an eqn. of f(x) and asked to f-1(a) where a is a given integer...always equate that eqn. to the no. a and solve!!

in this case 'a' is 1....and eqn. is 10^x
so 10^x = 1
solve usiing laws of indices...make the bases same
10^x = 10^0
therefore x=0

hope it's clear now

 

[student92]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

waalikum as salam
oh tanks its so simple i forgot that.

 

[TheMizan]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Assalamoalaikum.
i needed a bit help in paper 2.i tried it more then 3 times and left it, pls can any 1 help me out.its oct/nov 2004 . question no 19.

 

[CaptainDanger]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Mention the paper number?

 

[TheMizan]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

its paper 02