Perform the Indicated Operation and Write Your Answer with Positive $$\frac { ( \mathrm { mn } ) ^ { - 1 } } { \mathrm {~m} ^ { - 2 } + \mathrm { n } ^ { - 2 } }$$

question 227

Multiple Choice

Perform the indicated operation and write your answer with positive integer exponents.
- $$\frac { ( \mathrm { mn } ) ^ { - 1 } } { \mathrm {~m} ^ { - 2 } + \mathrm { n } ^ { - 2 } }$$

• A) \(\frac { m n } { n + m }\)
• B) \(\frac { n } { n ^ { 2 } - m ^ { 2 } }\)
• C) \(\frac { m ^ { 2 } + n ^ { 2 } } { m n }\)
• D) \(\frac { m n } { n ^ { 2 } + m ^ { 2 } }\)

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