The functions are and .

(a)

Graph :

Graph the functions and   in the viewing rectangles by :

Observe the graph.

As tends to then  and approaches to .

.

As tends to then  and approaches to .

.

The both functions of the end behavior is same as and .

Graph the functions and   in the viewing rectangles by :

Observe the graph.

As tends to then  and approaches to .

.

As tends to then  and approaches to .

.

The  end behavior of the both functions is same as and .

(b)

The functions are and .

Find .

As the functions of their ratios is . so their end behavior is same.

(a) and .

(b) when their ratios is approaches to then they have a same end behavior.