Perform the Indicated Operation and Write Your Answer with Positive $$\frac { m ^ { - 1 } - n ^ { - 1 } } { m ^ { - 1 } + n ^ { - 1 } } \cdot \frac { m + n } { m - n }$$

question 228

Multiple Choice

Perform the indicated operation and write your answer with positive integer exponents.
- $$\frac { m ^ { - 1 } - n ^ { - 1 } } { m ^ { - 1 } + n ^ { - 1 } } \cdot \frac { m + n } { m - n }$$

• A) \(\frac { \mathrm { m } - \mathrm { n } } { \mathrm { m } }\)
• B) \(- 1\)
• C) 1
• D) \(\frac { m n } { m + n }\)

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