Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If log 3 x = a and log 7 x = b, then which of the following is equal otlog 21 x?
A
ab
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
∴ log 3 x = a ⇒ 1/a = log x 3 & log 7 x = b ⇒ 1/b = log x 7
∴ log 21 x= 
= 
= 
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