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Aptitude - Logarithm - Discussion

Discussion Forum : Logarithm - General Questions (Q.No. 2)
Logarithm
2.
If log 2 = 0.3010 and log 3 = 0.4771, the value of log5 512 is:
2.870
2.967
3.876
3.912
Answer: Option
Explanation:
log5 512
= log 512
log 5
= log 29
log (10/2)
= 9 log 2
log 10 - log 2
= (9 x 0.3010)
1 - 0.3010
= 2.709
0.699
= 2709
699
= 3.876
Discussion:
71 comments Page 3 of 8.
Dhivi said:   1 decade ago
Can you say the answer for the (5/512) power 1/9?
Vaishu said:   1 decade ago
If log 2 10 = 0.3010 and log 7 10 = 0.8451, then the value of log 2.8?
Sumeet said:   1 decade ago
{log(10/2) = log5} Can we write like this? I have a doubt!
Sumeet said:   1 decade ago
If log(10/2) = log5, then log(512/5) should be equal to log(9/1). Isn't it?
Kate said:   1 decade ago
Please I don't know anything about math I need help forms you guys.
AJITHA said:   10 years ago
Can you explain it once for me?
AJITHA said:   10 years ago
log5 512 = log 512/log5 by which formula.
Ankur said:   10 years ago
Answer is right, but too long, tell in short.
Girish said:   10 years ago
That is base change rule it seems log (b) to the base a, = log (b) to base c/log (a) to base c i.e log 512/log5.
Pavan s@i said:   9 years ago
How to write log 4 power 2013, if log 2 = 0.3010? Please help me.
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