Practice problem
Which of the following are NOT sets written in roster form?
{2,3,4}\{2, 3, 4\}{2,3,4}
{hello, roster, set}\{\textit{hello, roster, set}\}{hello, roster, set}
{all divisors of 10}\{\text{all divisors of 10}\}{all divisors of 10}
{2,3,4,5,6,7,8,9,⋯ }\{2,3, 4, 5, 6, 7, 8, 9, \cdots\}{2,3,4,5,6,7,8,9,⋯}
{x∣x>1}\{x | x>1\}{x∣x>1}
Type a concept, like “slope” or “photosynthesis”.
