Can you help explain this doubt in solving an exercise with sets

[eddy2017]

Hi, I am studying sets and the relation between sets.
This exercise in Khan academy has the answer. It has already been solved. I don't understand something though. I'll copy it down below.

 

[eddy2017]

it is in Spanish ( from K.A). Why does it say that 'as x belongs to N, then x should be equal to 2,3,4. why not to 1?. Inthere lies my doubt. Is 1 not a natural number too and less than 5?. why only 2,3,4?

 

[BigBeachBanana]

View attachment 30331
it is in Spanish ( from K.A). Why does it say that 'as x belongs to N, then x should be equal to 2,3,4. why not to 1?. Inthere lies my doubt. Is 1 not a natural number too and less than 5?. why only 2,3,4?

Look at the statement before [imath]x \in \N[/imath]. It says 1<x<5 => x ={2,3,4}

 

[eddy2017]

Look at the statement before [imath]x \in \N[/imath]. It says 1<x<5 => x ={2,3,4}

oh, yea, thanks, buddy!. Merry Christmas, if you celebrate it, that is. x has to be less than 5 and more than 1.

 

[Steven G]

Before trying to figure out if something is in a set you need to 1st figure out what is in the set!

 

[eddy2017]

Thanks. Marry Christmas if you celebrate it.