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# Anyone need help with any *EDEXCEL* C3 and C4 past paper questions? watch

1. Hello there,

need help with any edexcel c3/c4 past paper questions?

let me know

thank you so much!!!
2. Wait! Give me 2 hours.

oh, you wanna help us? or you want us to help you?
3. i think the o.p is providing help not asking for it.

but yes, ive got c3 edexcel q's that id like to ask which i might contact you on very soon!
4. He is offering help. :P
5. I would very much like to help everyone.
6. I will be back to you soon!
7. I would like some help on C3, but I've not got any questions I'm stuck on yet. 4 Days until C3 exam Woop!!
8. cool!
9. (Original post by sulexk)
Hello there,

need help with any edexcel c3/c4 past paper questions?

let me know

thank you so much!!!
So how do I find the range of a graph? e.g. y=e^(x^2). I can sub x=0 and it works but how do you actually do it?
10. (Original post by sulexk)
Hello there,

need help with any edexcel c3/c4 past paper questions?

let me know

thank you so much!!!
could I private message you if I need help?
11. hey there,

So we know the domain is (ER)- all real numbers
Question is how do we workout the range?

well, if we consider e^x, we know that this function, is such that it will never be less than zero, even if you input x=-10000, you will never obtain 0, so for this function(e^x), the range is simply, (e^x)>0

but now what about for e^(x^2), well if you consider the graph, real quickly, you can figure our that it is just a parabola(U curve like x^2), so in this case the lowest value is e^0=1, so the range is

e^(x^2)>=0
12. hey there, sure you can private message me, infact please do!

thanks!
13. hey there, get cape wear cape fly, if you would like to me to expand on the question, please let me know.
I greatly appreciate it!

Thank you.
14. (Original post by sulexk)
hey there,

So we know the domain is (ER)- all real numbers
Question is how do we workout the range?

well, if we consider e^x, we know that this function, is such that it will never be less than zero, even if you input x=-10000, you will never obtain 0, so for this function(e^x), the range is simply, (e^x)>0

but now what about for e^(x^2), well if you consider the graph, real quickly, you can figure our that it is just a parabola(U curve like x^2), so in this case the lowest value is e^0=1, so the range is

e^(x^2)>=0
Okay, so what about a graph like e^(x+3) what would you do? This is my weakness.

btw youre so kind to do this lol
15. im sitting C3 and C4 this month and im really bricking it cause im actually terrible at maths.
i need a C from both papers and atm ts seems so impossible cause im self teaching by reading notes and doing a tonne of past papers.

can anyone help me with this Q?
its C3 from the June 2007 paper:

Q7. Sketch the graph of y = 2cosec 2(theta) for 0(deg)< (theta)< 360(deg)

the mark scheme just shows me and i dont understand..

Thanks!
16. Would anyone happen to have links for the solomon C3 paper G with MS?
17. A graph such as e^(x+3), is the same as e^x moved to the left by 3 units, so as we know the range for e^x, already, we can deduce the range for e^(x+3). The main feature that varies here, is the y-interception, instead of 1, it will now be e^3, since when x=0 , y=e^(0+3)=e^3

so the range will still be e^(x+3)>0
hope it helps, any further problems, please let me know.

thanks!
18. (Original post by Dyslex!c Duck)
im sitting C3 and C4 this month and im really bricking it cause im actually terrible at maths.
i need a C from both papers and atm ts seems so impossible cause im self teaching by reading notes and doing a tonne of past papers.

can anyone help me with this Q?
its C3 from the June 2007 paper:

Q7. Sketch the graph of y = 2cosec 2(theta) for 0(deg)< (theta)< 360(deg)

the mark scheme just shows me and i dont understand..

Thanks!
For the sec/cosec/tan graphs, it would be very useful to learn what they look like and their intersections with the axes!

For cosec(2x), it is the same as saying f(2x) which means the values of x get stretched to a scale factor of 1/a or in this case 1/2. So I would draw the original cosec graph and then apply this transformation for the x values.
19. hey there dyslexic duck, do you have the c3 book , I could walk you through those graphs very quickly if you like?

thanks!
20. (Original post by Apple24)
For the sec/cosec/tan graphs, it would be very useful to learn what they look like and their intersections with the axes!

For cosec(2x), it is the same as saying f(2x) which means the values of x get stretched to a scale factor of 1/a or in this case 1/2. So I would draw the original cosec graph and then apply this transformation for the x values.
thank you very much (:
i shall be in this thread alot.
seeing as im pretty stupid.
haaa.

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