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# Maths sketching curves

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1. https://aeb44e76c1fb598b02a447aec286...%20Edexcel.pdf
question 3A

https://aeb44e76c1fb598b02a447aec286...%20Edexcel.pdf
2. What did you get in GCSE maths?
3. (Original post by zXcodeXz)
What did you get in GCSE maths?
just look at the MS says pls
4. "the function f is even" means f(-x)=f(x), hence symmetry, similar to a cosine graph.
5. (Original post by JN17)
"the function f is even" means f(-x)=f(x), hence symmetry, similar to a cosine graph.
why do i have to draw the negative quadrant if its says x>0
6. (Original post by jonnypdot)
why do i have to draw the negative quadrant if its says x>0
It's in the wording, it says it "has domain R. For x>=0..." so the domain is not restricted, it's just saying that for values of x>=0, the y value is found from that equation. The full equation would be f(modulus x) I suppose, they're just trying to trick you with wording.

Most important thing is that they do not say the domain is x>=0, simply the function f(x) is used to find values for x>=0, then the "even function" means the graph is reflected in the y axis.
7. (Original post by JN17)
It's in the wording, it says it "has domain R. For x>=0..." so the domain is not restricted, it's just saying that for values of x>=0, the y value is found from that equation. The full equation would be f(modulus x) I suppose, they're just trying to trick you with wording.

Most important thing is that they do not say the domain is x>=0, simply the function f(x) is used to find values for x>=0, then the "even function" means the graph is reflected in the y axis.
makes sense, so is it correct to say if function is stated even for X>0 i should draw modded graph
8. (Original post by jonnypdot)
makes sense, so is it correct to say if function is stated even for X>0 i should draw modded graph
No, its only the fact that they said the function is even and there are no restrictions to the domain.
You shouldve been taught about odd/even functions, even if not in too much detail, perhaps google them, theres some decent explanations on wiki etc

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