I am lost on this problem.

-2^-3

The answer goes like this:

-1/2^3

I think I understand up to here. But where does the double negative come in on this next step?

--1/2*2*2

--1/4*2

--1/8

-*8/8-1/8

-8/8-1/8

-8-1/8

-9/8

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- Mar 31st 2008, 04:23 PMJerry Cunninghamnegative exponents
I am lost on this problem.

-2^-3

The answer goes like this:

-1/2^3

I think I understand up to here. But where does the double negative come in on this next step?

--1/2*2*2

--1/4*2

--1/8

-*8/8-1/8

-8/8-1/8

-8-1/8

-9/8 - Mar 31st 2008, 05:42 PMTheEmptySet
- Mar 31st 2008, 10:56 PMearboth
- Apr 2nd 2008, 04:52 AMice_syncer
That's very wrong

according to the question we need to find what -2^-3 is,

now get rid of the negative integer by converting the base(-2) to a fraction

so this implies (1/-2)^3

now it's easy, the answer is 1/-8

but we need to convert this to standard from, so we multiply both sides of the fraction by -1

so the final answer is -1/8

next time, try separating the exponents from the base with a parenthesis

(Emo)