1.

Q: $$ {({1\over25})^{-1\over2}}+{({8\over 27})^{-1\over3}}$$

A. $$ {9\over 2}$$
B. $$ {13\over 2}$$
C. $$ {13\over 15}$$
D. $$ {5\over 9}$$
Answer» C. $$ {13\over 15}$$


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