Aptitude - Logarithm - Discussion
Discussion Forum : Logarithm - General Questions (Q.No. 6)
6.
| If log10 7 = a, then log10 |  |
1 |  |
is equal to: |
| 70 |
Answer: Option
Explanation:
|
= log10 1 - log10 70 | |||||
| = - log10 (7 x 10) | ||||||
| = - (log10 7 + log10 10) | ||||||
| = - (a + 1). |
Discussion:
33 comments Page 1 of 4.
Anush said:
1 decade ago
How you got this second step?
Nithin said:
1 decade ago
Yes how did we get the second step?
Amrutha said:
1 decade ago
loga 1 = 0 so log 10 1 = 0
Nkululeko said:
1 decade ago
How you got second step?
Buncy said:
1 decade ago
How did you got the second step?
Gyan said:
1 decade ago
How do you get second step here ?
Shalini said:
1 decade ago
We know that.
Log 1= 0.
Put this value in 1st step we get.
0-log 70.
Log 1= 0.
Put this value in 1st step we get.
0-log 70.
Majnu said:
1 decade ago
Is log10 1 Zero...?
Swathi said:
1 decade ago
(log m-log n) is log(m\n) so we get log(70\1) tat is log(70) which can be written as log(7*10)
Tanmay Mishra said:
1 decade ago
How we got last step:
= - (log10 7 + log10 10)
= - (a + 1)
= - (log10 7 + log10 10)
= - (a + 1)
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