# Math Help - Set builder notations, exam #1 next thursday!

1. ## Set builder notations, exam #1 next thursday!

hello i am working on this study guide for exam 1

determine all the elements in each of the following sets.

{n|0=(n-2)(3n+1)(n-4), n $E$ N}

2. ## Re: Set builder notations, exam #1 next thursday!

So all natural number solutions to $(n-2)(3n+1)(n-4) = 0$ or n = 2 and n = 4, for $3n+1 = 0$ means n = $\frac{-1}{3}$ which is not a natural number.

so you have $\{2,4\}$