Final answer:
The simplest form of y7√ is y^(7/2).
Step-by-step explanation:
When we see a radical sign (√) in a mathematical expression, it indicates the square root of a number or variable. In this case, y√ means the square root of y. So, y7√ means the square root of y to the power of 7.
To simplify this expression, we can rewrite it as y^(7/2). This means taking the square root of y and then raising it to the power of 7. Therefore, the simplest form of y7√ is y^(7/2).