Find the interval where f(x) is concave up. Justify your answer.
f(x) is concave up on (1, 4) because the average rates of change are increasing.
What is the degree of the following function?
6x^7+3x^8-2x^2
8
What is the end behavior of the following function?
(4x^3+2x^2-7)/(5x^3+6)
Let
f(x)=x^2+4x+1.
Describe the transformations of the following functions that are transformations of f(x). (Hint: there are 4)
g(x)=3f(-4x)-7
Vertical dilation by factor 2
Horizontal dilation by factor 1/4
Reflection over/across the y-axis
Vertical translation by -7 units
On what open intervals is k(x) both increasing and concave down?
(-6,-3)
Where does f(x) have a point of inflection? Justify your answer.
f(x) has an inflection point at x = 1 because the average rates of change change from decreasing to increasing at x = 1.
Use the limit notation to state the end behavior of the polynomial functions.
f(X)= -8x^7+3x^2+5
Find the horizontal asymptote of
(x^3+x^2-9)/(x^5-3x^2-5x)
y = 0
Selected values of the continuous function g(x) are shown in the table above. Use the values in the table to answer the following. Let
h(x)=-2g(x-3)-5.
Find h(0).
h(0) = 3
Calculate the average rate of change of the function 𝑓(𝑥) =
x^2-9x
in the interval 2 ≤ 𝑥 ≤ 7.
0
The table gives values of a function f for selected values of x. Is the function linear or quadratic? Justify your choice with correct reasoning.
f(x) is quadratic; f(x) has a constant second difference over equal-length input value intervals OR the rates of change are changing at a constant rate.
Where is the relative maximum of the function? (Calculator!)
h(x)=2x^3-4x
(-0.816, 2.177)
Find the zeros of the function.
(4-x^2)/(x-2)
-2
The graph of f(x) is shown in the figure below and has the domain [-3,3] and the range [-5,3].
Let k(x)=-3f(2x)+1.
Find the domain and range of k(x).
Domain
[-3/2,3/2]
Range [-8,16]
Let g be an odd function that is strictly increasing. Selected values of g(x) are given in the table above. Find the values of the constants a, b, and c.
a = -12
b = 4
c = 8
Let
f(x)=x^2-4
The average rate of change of over the interval [c, 5] is equal to 3, where c is a constant. Find the value of c.
c = -2
Given the zero 4 − 𝑖, find all other zeros of the polynomial function
f(x)=x^4-8x^3+16x^2+8x-17
−1, 1, 4 − 𝑖, 4 + i
Find the vertical asymptote and holes (if any).
VA x = 0, x = 1
Hole x = -2
Selected values of the continuous function h(x) are shown in the table above. Use the values in the table to answer the following. Let
h(x)=6f(x+2)-3
Find f(4).
f(4) = 0
Find the line of best fit of the percentage of American homeowners.
regression equation: _______
regression equation
-0.009786x^2+38.7647x-38325.5
Let p(x) be the function that results from applying three transformations to the graph of g(x) in the order: a horizontal dilation by a factor of 1/2, a reflection over the y-axis, and a vertical translation by 1 unit.
Find the domain of g(x) if [-1/2, 4] is the domain of p(x).
Domain of g(x): [-2 , 1/4]
Which of the following statements are true about the polynomial function p(x)? (Select all that apply)
The degree of p(x) is even.
The degree of p(x) is at least 6.
p(x) has four real zeros.
Solve the following inequality. Answer using interval notation.(Calculator active)
(-∞,4/3] ∪(-1,2]
Let
w(x)=2h(x-3)+1
Find w(w(2)).
w(w(2)) = 3
A sheet of 16 cm x 12 cm card is used to make an open box. Four identical squares are cut out of each corner. Then, the remaining card is folded to make an open box. For what value of x is the volume the largest?
x = 2.26