Step-by-step Answer
PAGE: 139SET: ExercisesPROBLEM: 45
Please look in your text book for this problem Statement

Relation between and is .

Where is average rate during the first leg of trip.

            is average rate diruing the return trip.


There is a vertical asymptote at the real zero of the denominator .

The ratio of the leading coefficients of the numerator and denominator, because the degrees of the polynomials are equal.

There is a horizantal asymptote at the numerator .

The function is .

Graph :

Draw the coordinates.

Graph the function .


Evaluate the function for each value of to determine .


When , .

When , .

When , .

When ,.

When ,.

When ,.


is not reasonable for this situation.

Reasoning :


When ,

If , then will be negative and negative resistance is not possible.

(a). Graph of the function .


(c).  If , then will be negative.Negative resistance is not possible.


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