## Thinking Mathematically (6th Edition)

{x|x ∈ N and x$\geq$ 61}
{61,62,63,64,…} From the given question all the elements are natural numbers and greater than equal to 61. Assume x is an element in set builder notion, W is a set. W ={x|x∈ N and x$\geq$ 61 } .