if log72 m then log4928 is equal to | Examsbook

1965

Q: If log72 = m, then log4928 is equal to ?

1
1/(1+2m)
2
(1+2m)/2
3
2m/(2m+1)
4
(2m+1)/2m

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Answer : 2. "(1+2m)/2"
Explanation :
Answer: B) (1+2m)/2 Explanation: log4928 = 12log77×4 = 12+122log72= 12+log72= 12 + m= 1+2m2.

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