SOLUTION: {{{(9/10) ^-2 }}} i cant figure this out because when theres a negative exponent there's certain rules. please help

SOLUTION: {{{(9/10) ^-2 }}} i cant figure this out because when theres a negative exponent there's certain rules. please help

Algebra.Com

Question 314461:
i cant figure this out because when theres a negative exponent there's certain rules.
please help
Answer by texttutoring(324) (Show Source): You can put this solution on YOUR website!
When there is a negative exponent, all it means is that it becomes the reciprocal (flip the fraction)

For example, 9^(-2) = 1/9^2 = 1/81

So, if you have (9/10)^-2, it means you just flip the 9 and 10, and square both of them:

(9/10)^-2
=(10/9)^2
=100/81
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