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Relation between and is .
Where is average rate during the first leg of trip.
is average rate diruing the return trip.
(a).
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 .
(b).
Evaluate the function for each value of to determine .
.
When , .
When , .
When , .
When ,.
When ,.
When ,.
(c).
is not reasonable for this situation.
Reasoning :
.
When ,
If , then will be negative and negative resistance is not possible.
(a). Graph of the function .
(b).
(c). If , then will be negative.Negative resistance is not possible.
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