Mathematics: Post your doubts here!

[TheJDOG]

Thanku,so basically its expansion of any of the conjugates??

It's the expansion of any of the roots and simplifying it

 

[Sarosh Jameel]

PLZ HELP

 

[sara kamal]

It's the expansion of any of the roots and simplifying it

please explain how to eliminate y from last step to get answer for x in terms of a

 

[TheJDOG]

please explain how to eliminate y from last step to get answer for x in terms of a

Can you show me the question? I remember I have solved this question before, there is a way to do the last step

 

[BhaiArshad]

PLZ HELP

i) The function is made up of 2 parts: Curve + Straight line. The domain is given for both parts and the resulting graph is said to be of f(x). So if we look at the graph we know the max and min x-values. They are given in the domains in the question. Max x-value is 4 and Min x-value is -1.
Now the top part is the curve so we put x-value 4 in the curve equation to get the max y-value and the x-value -1 in the straight line equation to get the minimum y-value and that is the range.

ii) I hope you can find the inverses. They are easy. Here is the graph:
Dotted lines are from the inverse functions.

 

[Fiery987]

Need help ASAP
M/J 2014 P12 Q#2 (Binomial Part)
How do we DO these type of questions???

 

[iYuuki]

Hey guys, can anyone help me out with Q3 (i)? Thank you!

 

[Zash Riyash]

Hey guys, can anyone help me out with Q3 (i)? Thank you!

Shorten it to
=9x^2-6x
=3x^2-2x
=(3x-2)^2 +1

 

[iYuuki]

Shorten it to
=9x^2-6x
=3x^2-2x
=(3x-2)^2 +1

How did you shorten it to become 9x^2-6x?

 

[Zash Riyash]

How did you shorten it to become 9x^2-6x?

Divide the 12x by 2

 

[Omer egaily]

Divide the 12x by 2

i think if we divided the 12x we must divide the whole equation by 2

 

[sara kamal]

Can you show me the question? I remember I have solved this question before, there is a way to do the last step

http://maxpapers.com/wp-content/uploads/2012/11/9709_s13_qp_32.pdf
Q5

 

[Sarosh Jameel]

i) The function is made up of 2 parts: Curve + Straight line. The domain is given for both parts and the resulting graph is said to be of f(x). So if we look at the graph we know the max and min x-values. They are given in the domains in the question. Max x-value is 4 and Min x-value is -1.
Now the top part is the curve so we put x-value 4 in the curve equation to get the max y-value and the x-value -1 in the straight line equation to get the minimum y-value and that is the range.

ii) I hope you can find the inverses. They are easy. Here is the graph:
Dotted lines are from the inverse functions.

Thanks A LOT >>> really helpful !

 

[sara kamal]

Can you show me the question? I remember I have solved this question before, there is a way to do the last step

please explain me q in this paper too ,q7 part2
http://freeexampapers.com/A-Level/Maths/CIE/2012-Nov/9709_w12_qp_11.pdf

 

[Zash Riyash]

Good luck to all the people, who will be writing the P1 paper tomorrow!

 

[Ahmed Aqdam]

http://maxpapers.com/wp-content/uploads/2012/11/9709_s13_qp_32.pdf
Q5

y^2=6ax-3x^2
Insert this value of y in the equation of the curve to get an expression in x and a. Solve the equation.

 

[Autoriz]

Hey.
I m getting really tensed forr tomorrow's Math exam.
Has anyone been done with AS maths today?

 

[tiki-taka]

how to know if a function will have inverse or not ..and how to find minimum value for it to be inverse

 

[BhaiArshad]

how to know if a function will have inverse or not ..and how to find minimum value for it to be inverse

Go here: http://www.examsolutions.net/maths-revision/syllabuses/CIE/period-1/P1/module.php
See the function related pages.

 

[TheJDOG]

http://maxpapers.com/wp-content/uploads/2012/11/9709_s13_qp_32.pdf
Q5

Ahh I'm late, sorry I just arrived, what Ahmad said is true