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Sum
Evaluate:
`(3^-1xx9^-1)÷3^-2`
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Solution
`(3^-1xx9^-1)÷3^-2`
=`(1/3xx1/9)÷1/3xx1/3`
=`1/27÷1/9`
=`1/27xx9/1=1/3`
Concept: Concept of Exponents
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