Solution:
(1)
Start with f(x)=x3
1) Horizontal shift of |h| units
• f(x) → f(x + h)
h=4 unit moves left
2) Vertical Stretch by a factor of a
• f(x) → af(x)
a=3 then
3) Reflection across x-axis
• f(x) → -f(x)
------------------------------------------------
(2)
VERTICAL ASYMPTOTES
The line x=Lx=L is a vertical asymptote of the function
if the limit of the function (one-sided) at this point is infinite.
In other words, it means that possible points are points where the denominator equals 0 or doesn't exist.
So, find the points where the denominator equals 0 and check them.
x=1, check:
Since the limit is infinite, then x=1 is a vertical asymptote
HORIZONTAL ASYMPTOTES
Line y=Ly=L is a horizontal asymptote of the function y=f(x)y=f(x), if either
or,
and L is finite.
Calculate the limits:
Thus, there are no horizontal asymptotes.
SLANT ASYMPTOTES
Do polynomial long division
The rational term approaches 0 as the variable approaches infinity.
Thus, the slant asymptote is
y=x+4
Vertical asymptote: x=1
No horizontal asymptotes.
Slant asymptote: y=x+4
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