Mathematics: Post your doubts here!

[RoOkaYya G]

yes,but to use the eq we first hav to find the mid values of x,thenfx divided by f.dont u remember
i'm not talkin bout coded mean n variance formula

take mid value as mid value of class width.

 

[abdul moeed rana]

take mid value as mid value of class width.

yessss

 

[Keirad]

Sorry to post here but i need to somewhere.
This will help-

Please do watch and follow it.

 

[abdul moeed rana]

so how was paper 62
post ur answers to confirm

 

[Yusuf Iqbal]

so how was paper 62
post ur answers to confirm

How did u solve question 1....I kinda felt it really tough

 

[abdul moeed rana]

How did u solve question 1....I kinda felt it really tough

q1 1c1 * 1c1 * 48c43??in q1

 

[Yusuf Iqbal]

q1 1c1 * 1c1 * 48c43??in q1

Yes I did the same...hope we get it correct....btw how did u solve the 7th binomial question...

 

[abdul moeed rana]

Yes I did the same...hope we get it correct....btw how did u solve the 7th binomial question...

which 1

 

[RoOkaYya G]

Yes I did the same...hope we get it correct....btw how did u solve the 7th binomial question...

yeah it was a binomial the 1st part
then 2nd part was binomial to normal conversion
n 3rd part u shld write the condis like : n is large (>30) , np>5 and nq >5

 

[RoOkaYya G]

q1 1c1 * 1c1 * 48c43??in q1

its right.

 

[Awesome12]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w08_qp_1.pdf
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w08_ms_1.pdf

Question 10 (ii)
Please avoid solving it using differentiation. I haven't learnt it yet.

I don't get the gf (x) part. And why do we have to use the method; 'completing the square?

 

[Yusuf Iqbal]

Se

which 1

second part ...buddy......second question second part......can u tell me how u solve it

 

[RoOkaYya G]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w08_qp_1.pdf
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w08_ms_1.pdf

Question 10 (ii)
Please avoid solving it using differentiation. I haven't learnt it yet.

I don't get the gf (x) part. And why do we have to use the method; 'completing the square?

replace f(x) in g(x)
do d^2/dx^2 to show tht maximum is 9

 

[Awesome12]

replace f(x) in g(x)
do d^2/dx^2 to show tht maximum is 9

Thanks.

You have solved it using differentiation. The marking scheme considers this method as well 'Completing the Square'. How would you solve it to find the maximum, if we were to use the 'Completing the Square' method?

 

[Thought blocker]

replace f(x) in g(x)
do d^2/dx^2 to show tht maximum is 9

Let me show him answer in detail. Wait.

 

[RoOkaYya G]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w08_qp_1.pdf
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w08_ms_1.pdf

Question 10 (ii)
Please avoid solving it using differentiation. I haven't learnt it yet.

I don't get the gf (x) part. And why do we have to use the method; 'completing the square?

replace f(x) in g(x)
complete the square
equate the bracket u get from completing square to zero. ull get value of x
the value after the braket will be the value of y
(x,y) will be turning poitn so maximum point

like a(x-b)+c
x=b
y=c
max point (x,c)

 

[Thought blocker]

replace f(x) in g(x)
complete the square
equate the bracket u get from completing square to zero. ull get value of x
the value after the braket will be the value of y
(x,y) will be turning poitn so maximum point

like a(x-b)+c
x=b
y=c
max point (x,c)

Oh thank you for explaining rookz didu.
I was about to start.

 

[RoOkaYya G]

Oh thank you for explaining rookz didu.
I was about to start.

its ok kiddo

 

[Thought blocker]

replace f(x) in g(x)
do d^2/dx^2 to show tht maximum is 9

Do we do double differentiation?

 

[RoOkaYya G]

Do we do double differentiation?

yeah double differenciate to show max n min
diff once to show stationary point