The functions are and .

(a)

Verify graphically:

Graph the functions and .

Observe the graph: The two graphs are in same pattern and to represent the difference we use different colours.

Therefore, the two functions are same and it is verified graphically.

(b)

Verify algebraically:

Consider .

Let , then .

If , then .

The relationship between and can be represented by a right triangle.

.

.

.

.

Therefore, .

(c)

Observe the graph,

Horizontal asymptotes are at .

(a) The functions are equal graphically.

(b)

is verified algebraically.

(c)

Horizontal asymptote is at .