(non)fractional Negative Exponents

  • Thread starter wScott
  • Start date
  • #1
88
0
We got thirty questions dealing with zero and negative exponents, but I'm having trouble with the negative exponent questions.

An example of this is:

a^3b-2/3^-1a^4b^-3

(-3x^-2y^3/3^-3x^4y^8)^-2

Sorry if these two examples look messy I don't know how to write it out like people write equations on this site.
 

Answers and Replies

  • #2
Hurkyl
Staff Emeritus
Science Advisor
Gold Member
14,916
19
You could still use parentheses correctly. And spaces are terrific for readability. E.G. I think you meant to write:

a^3 b^-2 / (3^-1 a^4 b^-3)

for the first one.
 
  • #3
88
0
Thanks for the tip Hurkyl. Do you have any ideas on how to solve them?
 
  • #4
115
0
You should know (and remember) these relations when dealing with exponents:

[tex]x^{a}x^{b}=x^{a+b}[/tex] and [tex]\frac{x^{a}}{x^{b}}=x^{a-b}[/tex].

And, of course, [tex]x^{a}y^{b}\neq xy^{a+b}[/tex] and the same for the fractions.

Hint: If you click on the LaTeX images above you can see the code and learn how to use it in this forum.
 
  • #5
88
0
Thanks for the tip Assyrian.

But if you have a solution to the above problems it would definitely give me a kick start to my homework.
 
  • #6
115
0
Sorry, but solutions are not just given away. You have to show your work. What have you done so far on these problems?
 
  • #7
88
0
Well I think I've actually figured out the first one, I'm working on the second one rigt now but i might have it in a minute. here's my work for the first one by the wya, tell me if I got it right:
[tex]\frac{a^{3}b^{-2}} {3^{-1}a^{4}b^{-3}}[/tex]

[tex]=3a^{-1}b[/tex]

[tex]=\frac{3b} {a}[/tex]

if you cant see th LaTeX, I probobly put it in wrong, here's my work in plain text:

(a^3 b^-2) / (3^-1 a^4 b^-3)

= 3a^-1 b

=(3b) / a
 
  • #8
115
0
That looks correct. And yes, I can see the LaTeX.
 
  • #9
88
0
Thanks assyrian :)

Well I've looked at a few math help sites and a few tutorials, got some help from a teacher today, and didn't understand the lesson in calss yesterday, but I finally understand it :p

talk about dedication to the "arts" :)
 
  • #10
88
0
Can you explain something to me though?

I have a question that's written like this [tex]x^{2}y^{-3}[/tex] but I have no clue as to what they're asking of me.
 
  • #11
115
0
I don't know what the question is either. :smile: Do they want you to simplify [tex]x^{2}y^{-3}[/tex] or what?
 
  • #12
88
0
I have no clue and they don't tell you what you're supposed to do on the worksheet, which really sucks.

Well I thank you for your assistance Assyrian, but I'm going to go watch Harry Potter and the Goblet of Fire now while I redue all of my homework.

Thanks again, bye.
 
  • #13
115
0
Interesting....I'm soon to go and watch the same movie. :smile:
 

Related Threads on (non)fractional Negative Exponents

  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
5
Views
6K
  • Last Post
Replies
8
Views
2K
  • Last Post
Replies
7
Views
8K
  • Last Post
Replies
4
Views
5K
Replies
1
Views
611
  • Last Post
Replies
7
Views
8K
Replies
7
Views
1K
Replies
8
Views
929
Replies
5
Views
1K
Top