Answer:
Step-by-step explanation:
The idea of the square root of a number is that the square of it gives the number. Then the square of the square root of 16 will give 16.
The middle line of your problem statement tells you that the square of 16^(1/2) gives 16. This lets you interpret the meaning of 16^(1/2) as the same thing as the square root of 16.
16^(1/2) = √16 . . . . in radical form
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Additional comment
The index of the radical can be seen to be the denominator of the corresponding rational exponent. Of course, the index 2 in a square root symbol is "understood", rather than shown explicitly.
Using similar logic, for example, we can write ∛8 = 8^(1/3).
