Are these equations rational or irrational and why??

Question

anonymous · Answer

attachment

bobo-i-bo · Answer

O.o To prove them is not trivial!

bobo-i-bo · Answer

The second is relatively simple, can you do that one? Possibly the third one as well?

anonymous · Answer

I don't kno how, that's why i'm asking for some help.

bobo-i-bo · Answer

Do you know what the definitions of rational and irrational numbers are?

anonymous · Answer

Irrational numbers are numbers that cannot be expressed as a ratio of two integers.

bobo-i-bo · Answer

And rational numbers are numbers which can be expressed as a fraction of two integers ^_^

bobo-i-bo · Answer

So do you think you can express the second one in terms of a fraction of two integers?

anonymous · Answer

Yes for the second one, it's rational

bobo-i-bo · Answer

:)

bobo-i-bo · Answer

How about the fourth one? Can you express that as a rational number?

anonymous · Answer

The first one is irrational, the second rational, third is irrational, and the fourth is rational. Am I right?

bobo-i-bo · Answer

yup! :)

bobo-i-bo · Answer

Lol, any reasoning though? :P