Tutors Answer Your Questions about Functions (FREE)
Question 122742: let f= -3x+4 and g= -x^2+4x+1 find the following:
g(-2)
f(4)-g(4)
These two problems are giving me a headache. Please show me step by step how to solve so I can see what I'm doing wrong. Thank you in advance for your help
Click here to see answer by MathLover1(20849)   |
Question 122848: Given g(x)=2x-3, find g(x+2)-g(x):
My solution: find g(x+2)
=2(x+2)-3
=2x-1
Since g(x+2)=2x-1,
2x-1-2x-3
2x-2x-1-3
=-1-3
=-4
The answer is supposed to be 4, but I have -4
Isn't minus 1 minus 3 = minus 4?
=-2
I have a textbook (ISBN 0-321-13193-2)
Title: Basic Technical Mathematics, 8th edition
But the instructor gave us handouts of math functions to solve instead of using the book.
Click here to see answer by oscargut(2103)  |
Question 123152: Please help solve
Find the equations of the horizontal and vertical asymptotes for the following. Type none if the function does not have an asympote.
a) f(X)=2x+3/x+2
Answer: Horizontal
Vertical
B) g(x)=5x/x^2+1
Answer
Horizontal
Vertical
Click here to see answer by solver91311(24713)  |
Question 123214: a rancher has 360 yds of fencing with which to enclose two adjacent rectangular corrals- one for sheep and one for cows. A river forms one side - suppose the width of each corral is x yards
a- express the total area of the two corrals as a function of x
b- find the domain of the function
c- using the graph if the function shown below determine the dimensions that yield the maximum area
60, 10,800
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 123448: Please tell me if my thinking is correct on this problem. I have the express the rational exression in lowest terms.
If i figure that 2 goes into 38 19 times, m^3 - m^10 makes a neg exponent so I am going to put m^7 in the denominator, p^2-P^1 is p, that will go into the numerator. My answer should be.....
Correct??
Click here to see answer by jim_thompson5910(35256) |
Question 123559: I am practicing finding the domain of an expression in interval notation. A particular problem has brought confusion
radical x(square)-7x-18/x-12
I know that the denomenator cannot be zero, otherwise it would be undefined. So would the answer be [-9,2] U [2,infinity) and x cannot =12 ?
Am I on the right track with this?
Click here to see answer by stanbon(75887) |
Question 123559: I am practicing finding the domain of an expression in interval notation. A particular problem has brought confusion
radical x(square)-7x-18/x-12
I know that the denomenator cannot be zero, otherwise it would be undefined. So would the answer be [-9,2] U [2,infinity) and x cannot =12 ?
Am I on the right track with this?
Click here to see answer by chitra(359) |
Question 123760: Can you tell me if I am working this problem correctly. I am simplifing the expression, using only positive exponents in my answer.
I make the exponent positive by doing this 
Next I find that my LCD =
By multiplying all numerators by and canceling out where possible, I come up with a final answer of 
Am I correct with my steps and final answer? Thanks for your help in advance!
Lee
Click here to see answer by checkley71(8403) |
Question 123767: Could you please help solve for the following. I am so confused
I h(x)= f(x)+2, what would the new coordinates of P be after the shift? Give answer in (x,y) form. The p is (1,-1)
b) If k(x)=f(-x), what would the new coordinates of P be after the reflection? Give answer in (x,y) form.
Click here to see answer by stanbon(75887) |
Question 123784: Can you tell me if I am working this problem correctly. I am simplifing the expression, using only positive exponents in my answer.
I make the exponent positive by doing this
Next I find that my LCD =
By multiplying all numerators by and canceling out where possible, I come up with a final answer of
Am I correct with my steps and final answer? Thanks for your help in advance!
Lee
Click here to see answer by MathLover1(20849) |
Question 123817: Can you please help me answer this question from my textbook?
The domain of the function f/g for f(x)=square root (x-2) and g(x)=square root (x+4) is
Answer options:
A. x undifined -4
B. x undifined 4
C. [2,positive infinity)
D. [-4,positive infinity)
The symbol for undifined is an = with a / through it. The symbol for infinity looks like an 8 sideways.
Hope you can help me, thank you.
Click here to see answer by stanbon(75887) |
Question 123823: Can you please help me answer this question?
Find f(g(x)) and state its domain. f(x)=x^3,g(x)=3sqrt(1-x^3)
My answer options:
A.f(g(x))=sqrtx^3, domain:(neg. infinity, pos. infinity)
B.f(g(x))=1-x^3, domain:(neg. infinity, pos. infinity)
c.f(f(x))=0, domain:(-1,1)
D.f(g(x))=x^3, domain: [-1,1]
This is written exact.
Hope you can help me, thank you?
Click here to see answer by stanbon(75887) |
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