Chapter R - Section R.1 - Basic Concepts - R.1 Exercises - Page 9: 10

$k=\{ ...,-7,-5,-3,-1 \}$

Integers are the negative, zero, and positive numbers which include $\{...,-3,-2,-1,0,1,2,3...\}$. Odd integers are integers not divisible by $2$. Hence, the odd integers, $k$, less than $1$ are \begin{array}{l}\require{cancel} k=\{ ...,-7,-5,-3,-1 \} .\end{array}