Cheat Sheet — 1. Definitions // Set A contains elements 1,2 and 3
A = {1,2,3} // 2 is an element of A
2∈A // 4 is not an element of A
4∉A 2. Number Sets Naturals N = {1,2,3,4,...}
Integers Z = {...,-2,-1,0,1,2,...}
Rationals Q = Ratio of 2 integers. example…
