Aptitude - Logarithm - Discussion
Discussion Forum : Logarithm - General Questions (Q.No. 1)
1.
Which of the following statements is not correct?
Answer: Option
Explanation:
(a) Since loga a = 1, so log10 10 = 1.
(b) log (2 + 3) = log 5 and log (2 x 3) = log 6 = log 2 + log 3
log (2 + 3) 
log (2 x 3)
(c) Since loga 1 = 0, so log10 1 = 0.
(d) log (1 + 2 + 3) = log 6 = log (1 x 2 x 3) = log 1 + log 2 + log 3.
So, (b) is incorrect.
Discussion:
37 comments Page 2 of 4.
Venu said:
1 decade ago
If they say log 6 = log 2 + log 3, then log (2+3) = log 2 + log 3.
Can someone explain ?
Can someone explain ?
Swaroop said:
5 years ago
Answer D is correct too, since.
log(1+2+3)=log(6)=log(1*2*3)=log1+log2+log3.
log(1+2+3)=log(6)=log(1*2*3)=log1+log2+log3.
(3)
Deepak said:
7 years ago
I am not understanding this. Can anyone explain by taking general variable?
Palak Kapoor said:
10 years ago
If a=5 and b=4 then what is the value of log (a-b) (a^2-b^2-2^b)?
Dhaval said:
8 years ago
D is also incorrect.
log(1+2+3) = log 1* log 2 * log 3.
log(1+2+3) = log 1* log 2 * log 3.
(1)
Swaroop said:
5 years ago
According to me, Option B and D, both are incorrect.
(3)
Sanyal said:
8 years ago
Correct, Thanks for the given explanation.
Disha jhan said:
8 years ago
The answer B is correct. I agree with it.
Abhishek said:
7 years ago
The answer B is correct. I agree with it.
SYLVESTER said:
9 years ago
The given answer is absolutely correct.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers