cipher's question thread

[TrueTears]

So

I can not get a 6 either, stupid answers....

[cipherpol]

problem solved; it's supposed to have a coefficient of 2 at the front >>

I hate misreading things

[cipherpol]

Find the maximal domain for .

I can do this question graphically but not algebraically. Can someone show me the algebraic way?

[kamil9876]

the domain will be the set of all such that:



if then we have:



but since , is already satisfied, so the important part is:



if we have:



but again, is already satisfied since . hence:


is the important part.

so overall the domain is:

[cipherpol]

Thanks kamil

[cipherpol]

Another question:

Prove that

Thanks

[kamil9876]

let

[cipherpol]

Thanks again kamil