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.