Question:The value of log``343`` 7 is : 

A `1/3` 
B `- 3` 
C `- 1/3` 
D `3` 

+ Answer
A 

+ Explanation
Let `long_343 7 = m.`

Then, `(343)^m`

`= 7 ⇒ (7^3)^m`

`= 7 ⇔ 7^3m`

`= 7^1 ⇔ 3m`

`= 1 ⇔ m`

`= 1/3`.

`:. long_343 7 = 1/3.`

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Irin Moni

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