1 1) SHOW ALL WORK! For the following function: f (x) = ÷x³3 – 3x2 – 7x a) State the location of all vertical asymptotes and holes, if any: b) State all horizontal asymptotes, if any: c) State all local extrema (max and mins), if any and the intervals of increasing/decreasing:
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question 1 a b c d e
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Given,
On simplification, we get
a).
Clearly denominator cannot be zero for any value of x.
There are no vertical asymptotes and holes.
b).
Since the degree of numerator (3) is greater than the degree of denominator (0), therefore there are no horizontal asymptotes.
c).
Differentiating with respect to x, we get
Now to find critical values, solve the first derivative by equating it to zero. That is,
Therefore critical values are .
Now to the left of & to the right of .
And to the left of & to the right of .
Therefore is the point of local minima and is the point of local maxima.
Now local minimum value is,
& local maximum value is,
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