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:
38 comments Page 3 of 4.
Garvit said:
1 decade ago
Option D can't be considered answer. It's tricky actually:
LHS:
log (1+2+3) = log 6. [1+2+3 = 6].
RHS:
log1 + log2 + log3 = log (1x2x3) = log 6.
Since LHS = RHS (no matter how it comes) D isn't the option.
LHS:
log (1+2+3) = log 6. [1+2+3 = 6].
RHS:
log1 + log2 + log3 = log (1x2x3) = log 6.
Since LHS = RHS (no matter how it comes) D isn't the option.
Begum said:
1 decade ago
Its great.
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 ?
Tendai said:
1 decade ago
What about 243 base 9?
Akshayaa said:
1 decade ago
What about 828 with base 2?
Murali said:
1 decade ago
243 base 9.
This mainly 243 = 3*3*3*3*3 = 3^5.
And 9 = 3*3 = 3^2.
So answer is 5/2. I dot no how to write log in keyboard.
This mainly 243 = 3*3*3*3*3 = 3^5.
And 9 = 3*3 = 3^2.
So answer is 5/2. I dot no how to write log in keyboard.
Palak Kapoor said:
1 decade ago
If a=5 and b=4 then what is the value of log (a-b) (a^2-b^2-2^b)?
Shashi said:
1 decade ago
Its awesome.
SSD said:
1 decade ago
What is log to the base 5 512?
Deepak said:
8 years ago
I am not understanding this. Can anyone explain by taking general variable?
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