Preliminary SAT (PSAT) Practice Test

Question: 1 / 400

What does the expression b√x^a represent in mathematics?

Power of x

Root of x

The expression b√x^a represents a specific mathematical operation involving both roots and powers. In this context, the symbol √ indicates a square root, which means you're taking the square root of the quantity x raised to the power of a.

When you have b√x^a, this can be rewritten as b * (x^a)^(1/2). This shows that you are taking the square root (or 1/2 power) of x raised to the power of a. Therefore, this expression essentially describes the root of x.

Understanding that the square root function is fundamentally a root operation clarifies why the correct answer identifies this expression as representing the root of x, particularly focusing on the relationship between the variable x and the exponent a within the context of root operations.

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Exponent of b

Multiplication of x and a

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