Question
If `3^x - 3^(x - 1) = 18`, then the value of ` x^x` is :
Answer: Option C
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`3^x - 3^(x - 1) = 18 ` `hArr 3^(x - 1) (3 - 1) = 18 hArr 3^(x - 1) = 9 = 3^2 hArr x - 1 = 2 hArr x = 3`
`:.` ` x^x = 3^3 = 27`
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