Mathematics: Post your doubts here!

[Teach-me!]

Can someone pls tell me whether we need to learn all the math volume formula's for maths paper 4 ??????

i think vol. of sphere and cone formula would be given.

 

[sparsha.mehta]

i think vol. of sphere and cone formula would be given.

It depends....sometimes it givn sometimes its not.....so better learn as a precaution

 

[Renny]

yeah i guess ur right , i'll just revise all of them

 

[Teach-me!]

yeah i guess ur right , i'll just revise all of them

You know some formulas are derivable if you know the basic ones.

 

[mather marshal]

Hey will u please help me in Probability and vectors
my exams are tomorrow
and i dont know anything about that

 

[Loren M]

How do we do question 8c (iii) in paper 4 October 2009? Help please.

 

[nigga7]

How can someone explain hw to plot points???

wow!.... who told u the question is about plotting points? if it was that simple than i wouldnt be asking... anyways its okay i know the answer of that question.... but im still in doubt of question 8b and 8c

 

[xoxoxogaurav123]

Hey will u please help me in Probability and vectors
my exams are tomorrow
and i dont know anything about that

what do u wanna kno bout probability pls send ur doubts to [email protected]

 

[sparsha.mehta]

How do we do question 8c (iii) in paper 4 October 2009? Help please.

Divide 18(the frequency shown in table) by 7(the no.of square boxes is 3.5*2)

 

[xoxoxogaurav123]

Divide 18(the frequency shown in table) by 7(the no.of square boxes is 3.5*2)

2.5 students

 

[sparsha.mehta]

2.5 students

Yup....as the mark scheme says!!!!!

 

[xoxoxogaurav123]

Yup....as the mark scheme says!!!!!

hmmm totally rite!!!

 

[me_lonelyboy]

Salaam.

Hey.

That's a tough question. Is that an IGCSE question?

I got this answer.

kq-q=q
q(k-1)=q
k-1 = q/q
k-1 = 1
k = 1+1
k = 2

who knows?
my scl teacher gav it to me... believe so..

 

[Loren M]

Divide 18(the frequency shown in table) by 7(the no.of square boxes is 3.5*2)

How did you get 3.5 and why did you multiply it by 2? :S

 

[sparsha.mehta]

How didnu get 3.5 and why did you multiply it by 2? :S

Count half part of each block as one.
Fr the first one: till 5 in yaxis count it as1

 

[xoxoxogaurav123]

see 1 cm2 is 5 squares
frequency 18 is 36 squares
hw much frequency is 5 squares?

Ans- (5*18)/36= 2.5

 

[Loren M]

see 1 cm2 is 5 squares
frequency 18 is 36 squares
hw much frequency is 5 squares?

Ans- (5*18)/36= 2.5

How did you know 1 cm2 is 5 squares though ?

 

[xoxoxogaurav123]

1cm on y axis is 5 squares

 

[xoxoxogaurav123]

How did you know 1 cm2 is 5 squares though ?

1 cm on y axis is 5 squares

 

[Igcse stuff]

answer is x√3

ps : that is "x root 3"

to find the inverse of that function you have to use one of the laws of logs