Question

write in interval notation: all real numbers less than or equal to 8

Answer 1

what is your attempt?

Answer 2

that was my attempt i just dont know how to write it the original question was f(x)=√8-x

Answer 3

\[f(x)=\sqrt{8-x}\]

Answer 4

and you are trying to define the domain

Answer 5

yes

Answer 6

interval notation gives us endpoints inside of brackets

Answer 7

if an end point is part of the solution that it equals it, the bracket is an equal sign with a bar connecting it:



otherwise its just the ( or )

Answer 8

so we know we have end points if -inf and 8

-inf,8 -inf can never be equaled so we have ( and 8 is equaled so it has ]

(-inf,8] is the interval defining the domain

Answer 9

thank you !