Subjective Type

State whether each of the following sets is a finite set or an infinite set: {x:x=3n−2,n∈W,n≤8}

Solution

{x:x=3n−2,n∈W,n≤8}
Substituting the value of n=(0,1,2,3,4,5,6,7,8) we get
={−2,1,4,7,10,13,16,18,22}
It is a finite set.

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