Tutors Answer Your Questions about Exponents-negative-and-fractional (FREE)
Question 246820: I am hoping I am placing this is the correct category as I did not see one for rational expressions and equations.
I know this seems fairly simple but for some reason I am extrremly confused ....i would really appreciate some help and explantion as to what i might be doing wrong.....
1) x^5-4x^3, x^3+4x^2+4x Instructions state to find LCM
My answer: 2*2*x*x*x*x*x*x*x*x, 2*2*2*2*x*x*x*x*x*x
=2*2*2*2*x*x*x*x*x*x*x*x
answer: 16x^8
2)x^2/x-7 + 49/7-x
answer: 49x^2 (I believe x-7 and 7-x cancel out. I am very confused though and when looking at the other examples in the book and doing the other exercises it does not look like my answers are correct. I am unsure as to where exactly I am going wrong or what I am simply not getting. Thank you so much for any guidance you can give me.....I truly appreciate it.
Click here to see answer by stanbon(75887)  |
Question 246820: I am hoping I am placing this is the correct category as I did not see one for rational expressions and equations.
I know this seems fairly simple but for some reason I am extrremly confused ....i would really appreciate some help and explantion as to what i might be doing wrong.....
1) x^5-4x^3, x^3+4x^2+4x Instructions state to find LCM
My answer: 2*2*x*x*x*x*x*x*x*x, 2*2*2*2*x*x*x*x*x*x
=2*2*2*2*x*x*x*x*x*x*x*x
answer: 16x^8
2)x^2/x-7 + 49/7-x
answer: 49x^2 (I believe x-7 and 7-x cancel out. I am very confused though and when looking at the other examples in the book and doing the other exercises it does not look like my answers are correct. I am unsure as to where exactly I am going wrong or what I am simply not getting. Thank you so much for any guidance you can give me.....I truly appreciate it.
Click here to see answer by solver91311(24713)  |
Question 247343: I was given this problem and now I am at a lost.
The width of a retangle is 5 meters lass than twice its length. If it's area is 88 square meters, find the dimensions of the rectangle. I know that A= L * W and the equation is W=2L-5 But I can't get any farther than that to answer the question. Thanks for your help.
Click here to see answer by checkley77(12844) |
Question 248495: i need the derivative of
im not sure if that came out right with symbols, so i'm going to put it into mathematical terms as well...
(2x squared - 10) divided by (x squared + 5) squared.
i came up with a pretty crazy answer, and have no clue if it's right, it seems way too 'out there' to be correct...
am i anywhere close?
Click here to see answer by stanbon(75887) |
Question 248504: i need the derivative of
i've done it on paper so many times but it doesn't seem to come out right.
there must be some way for the derivative to either equal 0 or be undefined, and none have my answers have allowed for this. please help!
then i also need the second derivative as well..
Click here to see answer by stanbon(75887) |
Question 248504: i need the derivative of
i've done it on paper so many times but it doesn't seem to come out right.
there must be some way for the derivative to either equal 0 or be undefined, and none have my answers have allowed for this. please help!
then i also need the second derivative as well..
Click here to see answer by jsmallt9(3758) |
Question 248526: i need the derivative of
i've done it on paper so many times but it doesn't seem to come out right.
there must be some way for the derivative to either equal 0 or be undefined, and none have my answers have allowed for this. please help!
then i also need the second derivative as well..
Click here to see answer by richwmiller(17219)  |
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