Question

Express the interval in set-builder notation and graph the interval on number line

[-3, &inf;]

What is the interval in set-builder notation?

Answer 1

[3,\[\infty\]]

Answer 2

[3,[\infty\]]

Answer 3

are you sure it is [3,inf] and not [3,inf) ?

Answer 4

[-3,inf]

Answer 5

{x|____}

Answer 6

{ x | -3 <= x <= infinity }

Answer 7

hmm, i was thinking you'd need to also say that it was in extended reals or something given that infinity was included.

Answer 8

reasonable

Answer 9

could go with { x in [R] | ... } for that, but I'm guessing that's overkill