Final answer:
The symbol √ represents the square root. It does not represent the cube root, fourth root, or exponential function.
Step-by-step explanation:
The symbol √ is called the square root. It represents the value that, when multiplied by itself, gives the original number. For example, √25 = 5 because 5*5 = 25. So, option a. Square root is the correct answer.
The other options, b. Cube root and c. Fourth root, represent different types of roots. The cube root is the value that, when multiplied by itself twice, gives the original number. The fourth root is the value that, when multiplied by itself four times, gives the original number. Both of these options are not represented by the symbol √.
The option d. Exponential function is not represented by the symbol √. An exponential function has the form y = a^x, where a is a constant and x is the exponent.