C3 Modulus Domains and Ranges
Maths and statistics discussion, revision, exam and homework help.
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C3 Modulus Domains and RangesTitle meant to say C3, not C2! Silly typo.
I've just started self studying C3, and I'm not completely sure what domains and ranges exactly are. If I am given the domain of a function, how do I find the range?
E.g The function
is defined as follows: 
, domain 
What is the range of this function?
And if I were to be given the range of a function, how would I find the domain?
Thank you in advance
Last edited by CharlieBoardman; 15-07-2012 at 12:43. -
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Re: C2 Modulus Domains and RangesDomains are the set of values that the x co-ordinates of the function can take, the range is the set of values that the y co-ordinates can take.
In general, the range of the inverse function = the domain of the original function and the domain of the inverse function = the range of the original function.
You could sketch that function and obtain the range from there.
x> -5 therefore try different values close to -5 to get a rough idea -
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Re: C3 Modulus Domains and RangesExtricated has explained it well.(Original post by CharlieBoardman)
Title meant to say C3, not C2! Silly typo.
I've just started self studying C3, and I'm not completely sure what domains and ranges exactly are. If I am given the domain of a function, how do I find the range?
E.g The function is defined as follows: , domain
What is the range of this function?
And if I were to be given the range of a function, how would I find the domain?
Thank you in advance
To find the range of this function it will be better to sketch a graph.
You will surely know how to sketch
and will be aware of its asymptotes.
, so 
is a translation of by 5 units to the left.
Last edited by raheem94; 15-07-2012 at 14:54. -
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Re: C3 Modulus Domains and Ranges(Original post by Extricated)
Domains are the set of values that the x co-ordinates of the function can take, the range is the set of values that the y co-ordinates can take.
In general, the range of the inverse function = the domain of the original function and the domain of the inverse function = the range of the original function.
You could sketch that function and obtain the range from there.
x> -5 therefore try different values close to -5 to get a rough idea
Thanks guys, it helped a lot!(Original post by raheem94)
Extricated has explained it well.
To find the range of this function it will be better to sketch a graph.
You will surely know how to sketch and will be aware of its asymptotes.
, so is a translation of by 5 units to the left.
I understand now
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How's it cracking?(Original post by CharlieBoardman)
Awesome -
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Re: C3 Modulus Domains and RangesQuote me on the Year 11 thread, don't want to be spamming up the Maths Forum with general chit chat!(Original post by shadab786ahmed)
How's it cracking?
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Okay(Original post by CharlieBoardman)
Quote me on the Year 11 thread, don't want to be spamming up the Maths Forum with general chit chat!
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Re: C3 Modulus Domains and RangesI struggled A LOT with domain and range in C3. i got some questions, but others proved too difficult. LUCKILY, in the January edexcel c3 exam, there was only ONE domain/range question (and it was 1 mark) so I didn't even bother to do it.. That said, only take my approach if you really find them difficult, (I seem to be the only one lol)
