If 10^(x-1) + 10^(-x-1) = (1)/(3), then ...

If `10^(x-1) + 10^(-x-1) = (1)/(3)`, then `x` equals to

A

`+-"log"_(10)3`

B

`2"log"_(3)10`

C

`"log"_(3)3`

D

`"log"_(2) 10`

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The correct Answer is:

A

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