Between 1 and 3include 1 and 3?

Answer 1

If you are referring to a number line: If it is between 1 and 3, then no you would not include 1 and 3... If the notation is [1,3] then 1 and 3 are included (both 1&3 would be closed circles on the # line) If the notation is (1,3) then 1 and 3 aren't included (1 & 3 would be open circles on the number line) If the notation is [1,3) 1 is included 3 is not (1 is a closed circle, 3 is an open circle on # line) If the notation is (1,3] 1 is not included, 3 is included (1 is open circle, 3 is closed circle on the # line)