Mathematics: Post your doubts here!

[Haya Ahmed]

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

q8 (iii)

ZaqZainab
The Sarcastic Retard

 

[Haya Ahmed]

How can I integrate −20 +(2000)/(10 − h)(10 + h) ??

 

[Azee]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s05_qp_3.pdf

q4 (i)

 

[fakeaugpuppy]

Please tell me how to solve question 8 part 2 on this paper.
http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w11_qp_32.pdf

 

[Helpful]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s13_qp_62.pdf
May I please request anyone to help me with Q4 in the above paper. I can do the first part, and also find n, but don't know how to find k.

Thank you in advance. God bless.

 

[Serenia]

Hello. Can anyone please answer this question:
Express 4x^2-12x in the form (2x+a)^2+b.
This question is in the Pure Maths 1 paper 11 of the May/June 2014 session.
The answers on the mark scheme are a=-3 and b=-9.
I know how to complete the square when the coefficient of x is not 1, but, I can't do this one because x has a coefficient of 2 in the form in which they want the expression. I don't know how to go about it.
Thank you.

 

[Wkhan860]

Hello. Can anyone please answer this question:
Express 4x^2-12x in the form (2x+a)^2+b.
This question is in the Pure Maths 1 paper 11 of the May/June 2014 session.
The answers on the mark scheme are a=-3 and b=-9.
I know how to complete the square when the coefficient of x is not 1, but, I can't do this one because x has a coefficient of 2 in the form in which they want the expression. I don't know how to go about it.
Thank you.

Well it isn't tht hard....just put the 2 eqtns as equalant to each other nd expand (2x+a)+b
Aftr expanding it compare the values on Both syds

 

[robinhoodmustafa]

Hello. Can anyone please answer this question:
Express 4x^2-12x in the form (2x+a)^2+b.
This question is in the Pure Maths 1 paper 11 of the May/June 2014 session.
The answers on the mark scheme are a=-3 and b=-9.
I know how to complete the square when the coefficient of x is not 1, but, I can't do this one because x has a coefficient of 2 in the form in which they want the expression. I don't know how to go about it.
Thank you.

Please share the solution with me too

 

[robinhoodmustafa]

Well it isn't tht hard....just put the 2 eqtns as equalant to each other nd expand (2x+a)+b
Aftr expanding it compare the values on Both syds

could you show it?

 

[Wkhan860]

could you show it?

Yup wait a sec

 

[Wkhan860]

Could only fynd ths page in a hurry

 

[Serenia]

View attachment 50093
Could only fynd ths page in a hurry

Oh, okay! Yeah, it isn't that hard. Thank you very much

 

[robinhoodmustafa]

Could only fynd ths page in a hurry

Can I use this method in equations like "4x^2 -12 x + 2 ?

 

[Wkhan860]

Yup u can use bth mehods...I just feel ths methd a bit more easy

 

[Wolfgangs]

Can someone please solve this question as soon as possible? (P31 M/J 2013)

 

[The Sarcastic Retard]

Can I use this method in equations like "4x^2 -12 x + 2 ?

http://sketchtoy.com/64179082

 

[The Sarcastic Retard]

Can someone please solve this question as soon as possible? (P31 M/J 2013)

i) http://sketchtoy.com/64179135
ii) Non of my credits, "As line in parallel to x-axis so parallel vector of the line will be 1,0,0
equation of the line, r=(7,7,-5)+t(1,0,0)=(7+t,7,-5)
put these values of x,y,z in the equation of plain, and find the value of t.
find B by putting this value of t into equation of the line n find |AB|"

 

[Wolfgangs]

i) http://sketchtoy.com/64179135
ii) Non of my credits, "As line in parallel to x-axis so parallel vector of the line will be 1,0,0
equation of the line, r=(7,7,-5)+t(1,0,0)=(7+t,7,-5)
put these values of x,y,z in the equation of plain, and find the value of t.
find B by putting this value of t into equation of the line n find |AB|"

How to find t?

 

[The Sarcastic Retard]

How to find t?

"put these values of x,y,z in the equation of plain, and find the value of t."

 

[Wolfgangs]

"put these values of x,y,z in the equation of plain, and find the value of t."

I'm kinda confused with the second part, can you please do the full working for me?