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GarryVolchara [31]
3 years ago
9

How to get rid of a negative exponent in a fraction?

Mathematics
1 answer:
Sophie [7]3 years ago
6 0
So let’s say we have (3/2)^-2. We know that any negative exponent means we have to put that number under 1, with a positive exponent:

1 / (3/2)^2

There’s also another thing we can do. There’s a rule in maths that says we can get the positive exponent if we just flip the fraction, so we get:

(3/2)^-2

Flip it:

(2/3)^2

It would be the same as 1 / (3/2)^2, since that would be 1/1 / 9/4, resulting in 4/9 (multiply inner part with inner part (9*1) and that goes under, and outer with outer (4*1) and that goes over). (2/3)^2 is also 4/9, so both ways are valid.
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