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(1,5) This is an OPEN interval (dots are OPEN). The endpoints, 1 and 5, are NOT included. In interval notation, this is: All values from 1 to 5 NOT including 1and 5 In interval notation, this is: ( , ) The dots are OPEN. This is All values from 1 to 5 NOT including 1and NOT including 5 (fill in BLANKS) An OPEN interval A CLOSED interval [1,5] This is a CLOSED interval (dots are CLOSED). The endpoints, 1 and 5, ARE included. In interval notation, this is: All values from 1 to 5 INCLUDING 1and 5 [ , ] In interval notation, this is: Dots are CLOSED. This is... All values from 1 to 5 INCLUDING 1and 5 (fill in BLANKS) An OPEN interval A CLOSED interval Interval Notation Inequality: Interval (dots) CLOSED ? [1,5] ? 1≤x≤5 ? 1<x<5 ? OPEN ? (1,5) ? Write in interval notation:x ≥ 2 (-∞, 2] (-∞, 2) (2, ∞) [2, ∞) "x is equal to or greater than 2" Write in interval notation:x > 2 (2, ∞] (-∞, 2) (2, ∞) [2, ∞) "x is greater than 2" Write in interval notation:x > 2 (-∞, 2) (2, ∞] (2, ∞) [2, ∞) "x is greater than 2" Infinity is ALWAYS expressed as an OPEN interval, use ) not ] Correct answer Write in interval notation:-1≤ x < 4 (-1, 4] [-1, 4] [-1, 4) (-1, 4) Write in interval notation:-1 < x < 4 (-1, 4] [-1, 4] [-1, 4) (-1, 4) Select the appropriate interval representation for the number line shown. -1 [-1, 2) [-1, 2] (-1, 2] (-1, 2) 2 (-∞, -4) The interval to the left is: -4 [-4, -∞] 1 (-∞, -4] (-4, ∞) (1, ∞) The interval to the right is: -4 [1, ∞) 1 [1, ∞] (1, ∞) Select the appropriate interval representation for thenumber line shown (the union of both shaded parts). [-4, -∞] U (1, ∞) U means "union" (-∞, -4) U [1, ∞) (-∞, -4] U [1, ∞) (-4, ∞) U (1, ∞) -4 1 (((( THE )))) [[[[ END]]]] |