(a)

The function is $\"\"$ .

The function is in the form of $\"\"$ is a logarithmic function, where $\"\"$ is a positive constant.

The function $\"\"$ is a logarithmic function.

(b)

The function is $\"\"$ .

The function is in the form of $\"\"$ is a root function, where $\"\"$ is a positive integer.

The function $\"\"$ is a root function.

(c)

The function is $\"\"$ .

The function is in the form of $\"\"$ is a rational function, where $\"\"$ and $\"\"$ are the polynomials.

The function $\"\"$ is a rational function.

(d)

The function is $\"\"$ .

The function is in the form of $\"\"$ is a polynomial function of degree 2.

The function $\"\"$ is a polynomial function of degree 2.

(e)

The function is $\"\"$ .

The function is in the form of $\"\"$ is an exponential function, where $\"\"$ is a positive constant.

The function $\"\"$ is an exponential function.

(f)

The function is $\"\"$ .

The function contains the trigonometric functions

The function $\"\"$ is a trigonometric function.

(a) Logarithmic.

(b) Root.

(d) Polynomial with degree 2.

(e) Exponential.

(f) Trigonometric.