Math

(-10)^-1

A. -1/10
B. -1/1^10***
C. 1/10
D. 10

I had a little trouble when I started these. Can someone explain this to me?

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  1. a^-n = 1/a^n

    so (-10)^-1 = 1/(-10^1 = -1/10

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    posted by Reiny
  2. Thanks.

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    posted by Seo-yeon

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