Aptitude - Logarithm - Discussion
Discussion Forum : Logarithm - General Questions (Q.No. 9)
9.
If log10 5 + log10 (5x + 1) = log10 (x + 5) + 1, then x is equal to:
Answer: Option
Explanation:
log10 5 + log10 (5x + 1) = log10 (x + 5) + 1
log10 5 + log10 (5x + 1) = log10 (x + 5) + log10 10
log10 [5 (5x + 1)] = log10 [10(x + 5)]
5(5x + 1) = 10(x + 5)
5x + 1 = 2x + 10
3x = 9
x = 3.
Discussion:
14 comments Page 2 of 2.
Abdur Rafay said:
8 years ago
How the 1 turned into log10 10? Please explain.
Bhavya said:
8 years ago
Log10 10=1 so place of1 they take log10 10.
(1)
Vijju said:
5 years ago
@Chi.
How log 10 10 = 1?
How log 10 10 = 1?
Ashmi said:
8 years ago
How logx x=1?
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