The Math Meridian
Back to Functions, Exponentials and Logarithms

Function notation, domain and range

Questions at easy, medium and hard levels. Pick a level and get a fresh set every time, with instant feedback.

Learn it f(x) is the output when the input is x: replace every x with the input. The domain is all allowed inputs; the range is all possible outputs. You cannot divide by zero or take the square root of a negative number.

Example: f(x) = 2x² − 3x + 1. Find f(−2).

  1. f(−2) = 2(4) − 3(−2) + 1
  2. = 8 + 6 + 1 = 15.

Loading questions…