leehuan
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- May 31, 2014
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- 2015
To be honest I completely forgot about this. Thanks
To be honest I completely forgot about this. Thanks
Ah OK, cheers.
I will admit this is just a bit of confusion in my head and laziness to sort it out.
More concisely... ab>0
Only the case for (-1,0) but the whole question is again given (with a previous part)
Only the case for (-1,0) but the whole question is again given (with a previous part)
Variety is the spice of life.Alternatively alternatively:
When you specify a function f: X->Y you are also specifying the domain X and the co-domain Y.Lol thanks everyone. I ended up doing this:
Let x=-b, 0<b<1
RTP:1-b+b^2-b^3+b^4
1>b implies 1-b>0
b>0 allows multiplying by b^3: b^4-b^3>0
b>0 also implies b^2>0
Sum them up.
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Getting confused with what I learnt. Someone please break down surjective functions for me, and injective just means one-to-one both x and y (therefore inverse function exists for the maximum domain) right?