What is 9^(1/2)?

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Multiple Choice

What is 9^(1/2)?

Explanation:
Understanding fractional exponents helps here: an exponent of 1/2 means you’re taking a square root. So 9^(1/2) is the square root of 9. The number whose square is 9 is 3, since 3^2 = 9, and by convention we take the nonnegative root. Therefore the value is 3. (Note: -3 also squares to 9, but the principal square root is positive, so the answer is 3.)

Understanding fractional exponents helps here: an exponent of 1/2 means you’re taking a square root. So 9^(1/2) is the square root of 9. The number whose square is 9 is 3, since 3^2 = 9, and by convention we take the nonnegative root. Therefore the value is 3. (Note: -3 also squares to 9, but the principal square root is positive, so the answer is 3.)

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