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Tutors Answer Your Questions about Functions (FREE)
Question 46855: this question asks to:
"Find the domain and range of each function":
1.) y=x-1
2.) y=1/x
3.) y=1/(x^2+1)
4.) y=1/squareroot of x^2+x+1
can someone please show me how to do these? thanks for the help and please do help.
Click here to see answer by Nate(3495)   |
Question 47565: For the equation x-2sqrt.x=0 , perform the following:
a) Solve for all values of x that satisfies the equation.
Answer:
Show work in this space.
b) Graph the functions y = x and x-2sqrt.x=0 on the same graph (by plotting points if necessary). Show the points of intersection of these two graphs.
Graph:
Points of intersection:
Click here to see answer by venugopalramana(3286)  |
Question 47549: The table shows several value of the function f(x)=-x^3+x^2-x+2. Complete the missing values in the table, and then use these values and the imtermediate value theorem to determine (an) interval(s) where the function must have zero.
Table:
X |-2|-1| 0| 1| 2|
y |16| | | | |
I initially had 8, 0, -8, -4 in the blank spots of teh table for y but I am not sure if that is correct.
Click here to see answer by stanbon(26297) |
Question 47639: What do the following mean if:
a.) an expression is a function
b.) y is directly proportional to x (give an example)
c.) the coefficient of the third term is 5 ( give an example)
d.) a function only has one root
e.) a function is a polynomial
can someone help me with explanations for the above statements please? THANKS!
any help will be nice.
Click here to see answer by stanbon(26297) |
Question 47998: Find the exponential function of the form f(x)=ba^x+c with y-intercept 2, horizontal asymptote y=-2, that passes through the point P(1,4).
Possible solutions are:
a. f(x)=-2(2^x)
b. f(x)=2(2^x)-2
c. f(x)=2(1.5^x)-2
d. f(x)=4(1.5^x)-2
Click here to see answer by stanbon(26297) |
Question 48005: I am struggling with solving this problem. I hope there is someone who would be so kind as to show me all the steps in solving this problem.
For the function defined by f(x)=5x-4, find a formula for f^-1(x).
Thank you.
Click here to see answer by stanbon(26297) |
Question 48126: I was to rewrite the equation as a function of x and this is what I came up with but I cannot figure out which method is right.
2x - 8y = 48
2x + 8y = 2x+48
8y = 2x + 48
8 8 8
y = 2x + 6
8
f(x) = 2x + 6
8
Click here to see answer by Earlsdon(4900) |
Question 48547: I have a table that has the following values for x, f(x) & g(x):
x ---| 1,2,3,4,5
f(x)-| 5,3,5,1,2
g(x)-| 4,5,1,3,2
From the information a from the the table above, providing values for f(x) and g(x) evaluate (fog)^-1(3)
the choices I have are:
a. 1
b. 2
c. 4
d. 5
Thank you very much for you help in advance.
Click here to see answer by stanbon(26297) |
Question 48545: Please help me work out this problem.
For the function defined by f(x)=2-x^2, 0<=x, use a sketch to help find a formula for f^-1(x).
My possible answers to choose from are:
a. f^-1(x)=x^2-2, x<=2
b. f^-1(x)=1/2-x^2, 0<=x
c. f^-1(x)=sqrt2+sqrtx, 0<=x
d. f^-1(x)=sqrt 2-x, 0<=2
Click here to see answer by stanbon(26297) |
Question 48895: please help! I have been looking at this question for just over a week and ive put it off and done my others now this is one of the last ones!
let p : N x N --> N be the function defined by
p(m,n) ={1 if n=0;
m * p (m, n-1) otherwise;)
what is the value of p (2, 3)?
Click here to see answer by alka001(14) |
Question 49009: Explain please.
When you use Jay's Taxi Service, a two-mile trip costs $6.30, a five-mile trip costs $11.25, and a ten-mile trip costs $19.50. Write an equation to describe this relationship and use it to find the coast of a one-mile trip.
Click here to see answer by checkley71(8405) |
Question 49131: I have a word problem that I have been working on that I am not getting.
A manufacturer of compact stereos believes that the revenue the company receives is related to the price (p) of a stereo by the function R(p)= 180p-1/3p^2. What price will give the maximum revenue, and what is the maximum revenue? So what I am wondering is..... Do I just plug in different prices? I have done this, but I just kepp getting higher numbers. When do I know I have the max number? I was hoping it would just finally go into the negative, but it does not. so..... Any ideas?
Click here to see answer by venugopalramana(3286) |
Question 49122This question is from textbook Beginning Algebra
: the inventor of a new product believes that the cost of producing the product is given by the function
C(x)=1.75x +7000
If the inventor charges $4.00 per unit, then her profit for producing and selling x units is given by the function
P(x)=2.25x-7000
a) what is her profit if she sells 2000 units
b)what is her profit if she sells 5000 units
what is the break even point for sales.
Please helpThis question is from textbook Beginning Algebra
Click here to see answer by venugopalramana(3286) |
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