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


A) m−nm\frac { \mathrm { m } - \mathrm { n } } { \mathrm { m } }
B) −1- 1
C) 1
D) mnm+n\frac { m n } { m + n }

Correct Answer:

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