Maths, Addmaths and Statistics: Post your doubts here!

[Enferno]

i have this question g(x)=x2-xand they have asked for its inverse of g(6)

Please post the whole question.

 

[Galaxy]

This is 4024/11/M/J/12. Can anyone plis solve this

SalmanPakRocks redd OakMoon!

 

[ritesh isuri]

i have this question g(x)=x2-xand they have asked for its inverse of g(6)

well when u have to find the inverse of a question u have two options either u form an equation with Y, i.e u put Y=x2-x, u then make X the SOF and for the equation of the inverse u just put X in place of Y in the equation u got but here lets say its not possible! so u must choose the other method, u put the equation u got= the inverse they they told u ,

here it is, x2-x=6

and u rearrange the equation to get x2-x-6=0, and u get X=3 and -2

 

[ritesh isuri]

View attachment 19152 This is 4024/11/M/J/12. Can anyone plis solve this

for part b shade the 6th and 8th square

 

[ritesh isuri]

View attachment 19152 This is 4024/11/M/J/12. Can anyone plis solve this

and for part a shade the 6th and 14th one

 

[Galaxy]

for part b shade the 6th and 8th square

I dont get. Why?

 

[Hum199]

I tried to solve this question, I did the Part (i) and obtained the correct answer, but I cannot get the answer to Part (ii), my question is that
How is X equal to (A + I)-1 or whatever is in the question, please can anyone explain it . What is happening in this part? I am not getting it.






Question:
View attachment 18935

Answer:

View attachment 18936

Dude as far as i think, ther is a mistake in this question:
According to me The answer has to be : X = (A-1)-1 * B

 

[Enferno]

Dude as far as i think, ther is a mistake in this question:
According to me The answer has to be : X = (A-1)-1 * B

Yeah, should be. There is no possible reason for that statement.

 

[ritesh isuri]

for part b shade the 6th and 8th square

then the only line of symmetry will be the diagonal of the square frm the left down corner to the top right corner

 

[MuslimGirl]

AOA wr wb...
can anyone help me with this plz.....

 

[ritesh isuri]

AOA wr wb...
can anyone help me with this plz.....

for the first part its (5*2x)+(8*x)+(12*(x+80)), which is equai to 30x+960

 

[ritesh isuri]

AOA wr wb...
can anyone help me with this plz.....

and the 2nd part u put 30x+960=9360, u solve to get x=280 and the numbeer of tickets sold= (2*280)+(280)+(280+80)=1200

 

[MuslimGirl]

for the first part its (5*2x)+(8*x)+(12*(x+80)), which is equai to 30x+960

so why on earth is Marking Scheme, freaking me out?

 

[ritesh isuri]

so why on earth is Marking Scheme, freaking me out?

is the answer good?

 

[MuslimGirl]

is the answer good?

http://papers.xtremepapers.com/CIE/...D (Calculator Version) (4024)/4024_s03_er.pdf
chk this out... question 2
p.s *Examiner report

 

[ritesh isuri]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s03_er.pdf
chk this out... question 2
p.s *Examiner report

r u sure its the right examiner's report coz in the answer for question 2 there isn't any mentionn of x whereas it had said to form an eqt in x!!

 

[MuslimGirl]

r u sure its the right examiner's report coz in the answer for question 2 there isn't any mentionn of x whereas it had said to form an eqt in x!!

i guess.... this is the paper....
http://papers.xtremepapers.com/CIE/...(Calculator Version) (4024)/4024_s03_qp_2.pdf

 

[ritesh isuri]

i wanted to ask u all one thing is it true that if u do not tick which question u r answering in thee either or section in add maths u will lose all u marks???

 

[ritesh isuri]

i guess.... this is the paper....
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s03_qp_2.pdf

i was looking on the first page u should look on page 7 my answers are right!!

 

[MuslimGirl]

Thankyou! ritesh isuri