VCE Stuff > VCE Specialist Mathematics
subsets of C
Collin Li:
--- Quote from: enpassant on March 30, 2008, 10:45:37 pm ---Not making sense!
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It's just pure algebraic hackwork. There are a few milestones.
1. Change the modulus into the algebraic expression (surds)
Now, we want to simplify the relationship between and :
2. Move one of the surds to the other side so that it is easier to square both sides (which is critical to simplifying the and terms).
Now we can square both sides.
3. One surd will be left over after simplifying. Isolate it and square both sides again.
4. Simplify a final time.
That is the strategy, and that is what Toothpick has done
evaporade:
I agree it made no sense. Sketch and see.
Toothpaste:
--- Quote from: evaporade on March 30, 2008, 10:56:14 pm ---I agree it made no sense. Sketch and see.
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Ahmad pointed that out too. (part i)
Collin Li:
--- Quote from: evaporade on March 30, 2008, 10:56:14 pm ---I agree it made no sense. Sketch and see.
--- End quote ---
I haven't checked the working, but I have noticed she hasn't put down any domains and ranges. There are certain restrictions.
From this line of working:
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Since the RHS is negative:
This may be why the function might nominally exist in cartesian form, but may actually not show up, or make sense.
Ahmad:
contradiction.
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