The Real Number Line

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[edit] Real Number Line

  • ( x| a < x < b ) = [a, b]
  • ( x| a < x < b ) = ]a, b]
  • ( x| a < x < b ) = [a, b[
  • ( x| a < x < b ) = ]a, b[
  • ( x| x > a ) = [ a, ∞[
  • ( x| x > a ) = ] a, ∞[
  • ( x| x < a ) = ] -∞, a]
  • ( x| x < a ) = ] -∞, a[

[edit] Linear Inequalities

  • When dividing or multiplying by a negative number the direction of the inequality reverses.
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