SAT Math Question of the Day

Math Category: Exponents Level 1:

Q: What is 2-1?

  1. -2
  2. -1/2
  3. 0
  4. 1/2
  5. 2

UNANSWERED.

The correct answer is D.

A: The answer is 1/2. A number to the -1 power is 1 divided by the number.