Mathematics: Post your doubts here!

[Bilal Khan]

Solve the equation
2( ln5 − e^−2x) = 1,
giving your answer correct to 3 significant figures.

 

[sara kamal]

http://maxpapers.com/wp-content/uploads/2012/11/9709_w12_qp_31.pdf
plz explain q8 part 1

 

[yoyoyoyoyoyoyoyoyoyo]

http://maxpapers.com/wp-content/uploads/2012/11/9709_w12_qp_31.pdf
plz explain q8 part 1

calculate dy/dx and equate it to zero. this will give you the x coordinate

 

[Shamoo2811]

http://studentbounty.com/pastpapers...athematics (9709)/2010 Jun/9709_s10_qp_31.pdf

Could someone help me with Q6 part 1?

 

[TheJDOG]

http://studentbounty.com/pastpapers/Cambridge International Examinations (CIE)/International AS and A Level/Mathematics (9709)/2010 Jun/9709_s10_qp_31.pdf

Could someone help me with Q6 part 1?

Here you go, justified everything on the sides

 

[TheJDOG]

Guyzz I really need help for q#6 full q
N q#7 iv)

Here's all of q6.,(good question btw)
Read carefully

 

[TheJDOG]

Guyzz I really need help for q#6 full q
N q#7 iv)

Here's 7 iv)

 

[TheJDOG]

Solve the equation
2( ln5 − e^−2x) = 1,
giving your answer correct to 3 significant figures.

Is it only like this or is there more to it?

 

[sara kamal]

calculate dy/dx and equate it to zero. this will give you the x coordinate

well i did so but i m not getting my answer

 

[TheJDOG]

well i did so but i m not getting my answer

Here's Q8 i)
Tell me if you want me to explain it more

 

[qwertypoiu]

http://maxpapers.com/wp-content/uploads/2012/11/9709_w12_qp_31.pdf
plz explain q8 part 1

EDIT: there's already an answer above with more clear workings look at that one instead

 

[TheJDOG]

Qwerty's working is perfecto too

 

[yoyoyoyoyoyoyoyoyoyo]

Here's 10 iii)

you didnt give me the other solutions ? :/

 

[TheJDOG]

you didnt give me the other solutions ? :/

I'm sorry, I forgot :/ wait ill do them now

 

[TheJDOG]

thanks a lot man. ive got more questions

s14 p31 q5(ii) q8(i) pls ?

http://maxpapers.com/syllabus-materials/mathematics-9709-a-level/attachment/9709_s14_qp_31/

Here's 5 ii) , I'm 100% sure there's a much easier and faster way to do it, but sadly I don't know , so I did it in the long way. I still obtained the correct answers though, I'll sketch 8) i) for you soon .
If someone knows the easier way please do cooperate .
Thanks

 

[Haya Ahmed]

http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w08_qp_3.pdf

Q8 (iii), why is it wrong to integrate 20h^2/100-h^2 instead of the other one?

 

[TheJDOG]

thanks a lot man. ive got more questions

s14 p31 q5(ii) q8(i) pls ?

http://maxpapers.com/syllabus-materials/mathematics-9709-a-level/attachment/9709_s14_qp_31/

Here's 8)i) tried to be neat

 

[iYuuki]

http://onlineexamhelp.com/wp-content/uploads/2012/05/9709_s07_qp_3.pdf

I need help for question 9(ii). I don't get what the examiner report says about finding unit vector k??

 

[kitkat <3 :P]

Bilal Khan

 

[Bilal Khan]

Is it only like this or is there more to it?

Yes , though your answer is wrong.