A 3
B -3
C 7
D 9
Correct Answer: Option B
125 (√5)2x = 1
=> 53 (√5)2x = 1
=> 53.5(2x).(1/2) = 1
=> 53+x = 50
=> 3 + x = 0
∴ x = -3
Download our app for free and access thousands of MCQ questions with detailed solutions