Answer and Step-by-step explanation: Power Functions are of the form:
![f(x)=ax^(b)](https://img.qammunity.org/2021/formulas/mathematics/high-school/ihp427zw6e3hgcnc6577e5mwsa4apv2j4w.png)
where a is scaling factor, which means, it moves the values of
up or down;
and b is exponent or power, which determines the rate of growth or decay of the function.
The difference between exponential and power functions, is that in power functions, a variable base is elevated to a fixed exponent.
For that reason, Equations:
A.
![f(x)=2^(4√(x) )](https://img.qammunity.org/2021/formulas/mathematics/high-school/1q4o5587bbl3z015ulnhbnnjggk53mhtm9.png)
B.
![f(x)=(\pi)/(x)](https://img.qammunity.org/2021/formulas/mathematics/high-school/j677ycwkpiaomtaiejcq6gmpryx21hijoj.png)
C.
![f(x)=2.3^(x)](https://img.qammunity.org/2021/formulas/mathematics/high-school/hi9b6c2cd3nb4ragjw76l400cmqj2tcgue.png)
D.
![f(x)=2^(3√(x) )](https://img.qammunity.org/2021/formulas/mathematics/high-school/9oxx3d507dult4bh2d6uxwlyink38lpnuy.png)
are NOT power functions.