anonymous
  • anonymous
8. Is the following statement always, never, or sometimes true? A number raised to a negative exponent is negative. always never sometimes
Mathematics
katieb
  • katieb
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Directrix
  • Directrix
What does (-2)^(-2) equal?
anonymous
  • anonymous
-4?
anonymous
  • anonymous
that would still be -4 right?

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Directrix
  • Directrix
|dw:1360016190972:dw| (-2)^(-2) =
Directrix
  • Directrix
that would still be -4 right? --> No.
anonymous
  • anonymous
why not?
Directrix
  • Directrix
What about (-2)^(-3)? Is it positive or negative?
anonymous
  • anonymous
positive
Directrix
  • Directrix
>why not? Look at my work above
anonymous
  • anonymous
I don't understand all of the signs :(
Directrix
  • Directrix
|dw:1360016415936:dw|(-2)^(-3)
anonymous
  • anonymous
so a negative and a negative equals a positive?
Directrix
  • Directrix
It is not that simple. (-2)^(-3) does NOT mean (-2) times (-3). It means 1 divided by (2^3).
anonymous
  • anonymous
oh so is the answer never? cuz if you make it into a fraction ita always gonna be positive on the bottom.
Directrix
  • Directrix
Directrix
  • Directrix
Number raised to negative exponent: (-2)^(-2) = 1/4 Another number raised to negative exponent: (-2)^(-3) = - 1/8 A number raised to a negative exponent can be positive or can be negative.
anonymous
  • anonymous
Oh I didn't know that :/ I'm sorry I took so long :/
Directrix
  • Directrix
Fast is fine but accuracy is everything. (Wyatt Earp) Mathematics takes time and patience. Don't apologize. I'm glad to help.
anonymous
  • anonymous
so whats the answer

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