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HSC 2014 MX2 Marathon (archive) (1 Viewer)
- Thread starter Trebla
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Re: HSC 2014 4U Marathon
Like your solution better though
edit: how do you use less than signs without stuffing up...
Did it a different way by letting w=x+iy and simplifying z, to get z=i(y/(1-x))=+-i(sqrt((1-x)/(1+x)), which for -1(lessthan)x(lessthan)1 ,draws out the imaginary axis with a hole at origin.
Like your solution better though
edit: how do you use less than signs without stuffing up...
Last edited:
Kurosaki
True Fail Kid
Re: HSC 2014 4U Marathon
You just do <
Do you mean in LatexDid it a different way by letting w=x+iy and simplifying z, to get z=i(y/(1-x))=+-i(sqrt((1-x)/(1+x)), which for -1(lessthan)x(lessthan)1 ,draws out the imaginary axis with a hole at origin.
Like your solution better though
edit: how do you use less than signs without stuffing up...
You just do <
Fizzy_Cyst
Well-Known Member
Re: HSC 2014 4U Marathon
Four digits numbers are formed from the digits 1,2,3,4. Each digit is only used once. What is the sum of all the numbers that can be formed?
Four digits numbers are formed from the digits 1,2,3,4. Each digit is only used once. What is the sum of all the numbers that can be formed?
Kurosaki
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Carrotsticks
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Re: HSC 2014 4U Marathon
Never mind, read the question as finding the sun of the digits.
mreditor16
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Re: HSC 2014 4U Marathon
And lol I made that mistake originally as well haha
*sum
And lol I made that mistake originally as well haha
Last edited:
Kurosaki
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mreditor16
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faisalabdul16
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Fizzy_Cyst
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Fizzy_Cyst
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Re: HSC 2014 4U Marathon
EDIT:
just checked -- a couple of MCQ's the same, but that is it
Was it? I got it from Normanhursts trial from this year. It was Q10. Perhaps they used the same paper?
EDIT:
just checked -- a couple of MCQ's the same, but that is it
Last edited:
dan964
what
Re: HSC 2014 4U Marathon
yeah it is 66660.
yeah it is 66660.
Fizzy_Cyst
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Re: HSC 2014 4U Marathon
^{n} \ d \theta \ \ $for$ \ n \geq 0 \\ \\ $i) Show$ \ \ I_{n+1} = \frac{2n+1}{n+1}I_{n} \ \ \ \fbox{3} \\ \\ $ii) Hence, or otherwise, find I_{3}\ \ \ \fbox{2})
mreditor16
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Re: HSC 2014 4U Marathon
haven't tried it, but I think double angle has to be used here....
Fizzy_Cyst
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