Tuesday, January 5, 2010

`5^(6x) = 8320` Solve the equation accurate to three decimal places

For exponential equation: `5^(6x)= 8320` , we may apply the logarithm property:


`log(x^y) = y * log (x).`


This helps to bring down the exponent value.


 Taking "log" on both sides:


`log(5^(6x))=log(8320)`


`6x * log (5) = log(8320)`


Divide both sides by log (5) to isolate "6x":


`(6x * log (5)) /(log(5))= (log(8320))/(log(5))`


`6x=(log(8320))/(log(5))`


Multiply both sides by `1/6` to isolate x:


`(1/6)*6x=(log(8320))/(log(5))*(1/6)`


`x =(log(8320))/(6log(5))`


`x=0.935`

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