Discrete Structures - {x:2x∈N}

[lufee84]

Have this one multiple questions but my answer seems wrong (both The set of even numbers starting from 1 and The set of even integers), am I understanding it differently??

As the x is natural number it can only be something from {1,2,3...} right? I got every questions ok but not just this one.

Thanks for your help

 

[stapel]

Have this one multiple questions but my answer seems wrong (both The set of even numbers starting from 1 and The set of even integers), am I understanding it differently??

As the x is natural number it can only be something from {1,2,3...} right? I got every questions ok but not just this one.

Thanks for your help


View attachment 7885

The set definition is written as "all x, such that the value 2x is a natural number". So, for instance, x = 1/2 could be a member, since 2x = 2(1/2) = 1 is a natural number.