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# Mathematics - Problems with Sets

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Express the set using set- builder notation. Use inequality notation to express the condition x must meet in order to be a member of the set.

1. A= { 12, 13, 14, 15, 16,...}

2. A= { 600, 601, 602,...,6000}

3. Calculate the number of subsets and the number of proper subsets for the set.

1. the set of natural numbers less than 10

2. { x / x is a day of the week}

https://brainmass.com/math/combinatorics/mathematics-problems-with-sets-186783

#### Solution Preview

Dear student, see below for the solution to this problem.

1. A= {12, 13, 14, 15, 16, ...}
Observe that the elements of set A are natural numbers more than or equal to 12. So, we can write it as
A= {xN/ x≥12}

2. A= {600, 601, 602, ... ...

#### Solution Summary

The following posting helps with problems involving mathematical sets.

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