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Given `f(x)=-(x-1)(x+2)^3` :
(1) The y-intercept is found when x=0, thus y=-(-1)(2)^3=8 and the y-intercept is 8
The x-intercept(s) are where y=0: 0=(x-1)(x+2)^3
By the zero product property, either x-1=0 and/or (x+2)^3=0. Thus the x-intercepts are x=1 and x=-2.
(2) The e` `nd behavior is `f(x)=-x^4`` ` (See graph below). Expanding the binomials and multiplying, we see that this is a polynomial with highest degree 4 and leading coefficient -1. (Expands as `-x^4-5x^3-6x^2+4x+8` )
(3) Since this is a fourth degree polynomial, the maximum number of turning points is 4-1=3.
Graphed with y=x^4 on larger scale:
sorry the rest of the problems
Analyze the graph of the following function as follows:
(a) Find the x- and y-intercepts.
(b) Determine the end behavior: find the power function that the graph of f resembles for large values of |x|.
(c) Find the maximum number of turning points.
(d) Graph the function and submit the graph to the Dropbox.
Please show all of your work.
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