A) 10
B) 9
C) 20
D) 30
Correct Answer: B
Solution :
(b): \[{{\left( \frac{5}{9} \right)}^{-2}}\times {{\left( \frac{3}{5} \right)}^{-2}}\times {{\left( \frac{3}{5} \right)}^{0}}\] \[=\frac{{{5}^{(-2)}}}{{{9}^{(-2)}}}\times \frac{{{3}^{(-2)}}}{{{5}^{(-2)}}}\times 1=\frac{{{9}^{2}}}{{{3}^{2}}}=9.\]You need to login to perform this action.
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