Question

How do you solve `9^(x-4)=7.13`?

Answer 1

Solution: `x~~ 4.894`

Explanation:

`9^(x-4)=7.13` . Taking natural log on both sides we get,

`(x-4)ln 9 = ln 7.13`

`:. (x-4) = ln 7.13/ln 9` or

`(x-4) ~~ 0.894:. x~~ 4+0.894~~ 4.894`

Solution: `x~~ 4.894` [Ans]