Aptitude - Logarithm - Discussion
Discussion Forum : Logarithm - General Questions (Q.No. 12)
12.
| If logx |  |
9 |  |
= - | 1 | , then x is equal to: |
| 16 | 2 |
Answer: Option
Explanation:
| logx | |
9 | |
= - | 1 |
| 16 | 2 |
 x-1/2 |
= | 9 |
| 16 |
| |
1 | = | 9 |
| x | 16 |
| x = |
16 |
| 9 |
| x = |
|
16 | |
2 |
| 9 |
| x = |
256 |
| 81 |
Discussion:
17 comments Page 2 of 2.
Hemant said:
9 years ago
Your explanation is too good @@Rohit.
Mounika said:
9 years ago
If logx (0.1) = -1/3, then the value of x is.
Please tell me the answer for this.
Please tell me the answer for this.
Jai said:
10 years ago
I can't get that clearly, please some one explain me short & sweetly.
Sushant said:
1 decade ago
Multiplying both side by -2 we get,
-2Logx(9/16) = 1.
Logx(256/81) = 1.
x pow 1 = 256/81.
x = 256/81.
-2Logx(9/16) = 1.
Logx(256/81) = 1.
x pow 1 = 256/81.
x = 256/81.
Keerthi said:
1 decade ago
While multiplying both sides by - (1/2) RHS becomes 1/4. How come 1? I can't understand.
Malathi said:
1 decade ago
I can't understand.
JOSHUA said:
1 decade ago
You must cross multiply at the third, why reciprocating at that place?
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