A) -2
B) 2
C) 5
D) 21
Correct Answer: C
Solution :
\[{{\left( \frac{3}{4} \right)}^{3}}\times {{\left( \frac{4}{3} \right)}^{-7}}={{\left( \frac{3}{4} \right)}^{2x}}\] \[\Rightarrow {{\left( \frac{3}{4} \right)}^{3}}\times {{\left( \frac{3}{4} \right)}^{7}}={{\left( \frac{3}{4} \right)}^{2x}}\] \[\Rightarrow {{\left( \frac{3}{4} \right)}^{10}}={{\left( \frac{3}{4} \right)}^{2x}}\] \[\Rightarrow \,2x=10\Rightarrow x=5\]You need to login to perform this action.
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