Question

For any nonnegative real number.

Answer 1

A

Explanation:

We know that
`√(b)=b^(1/2)`.

We also know that
`(a^b)^c=a^(bc)`.

We can combine these facts to get
`(√(b))^2=(b^(1/2))^2=b^(1/2*2)=b^(1)=b`.

So, the answer is
`\boxed{A}` and we're done!

Note: the non-negative part or the equation comes from the fact that you assume the square root of a negative number doesn't exist. You will change this assumption later in the year, or in further years.