Saturday, January 8, 2011

`log_2(x - 1) = 5` Solve the equation accurate to three decimal places

`log_2 (x-1) =5`


To solve, convert the equation to exponential form.


Take note that if a logarithmic equation is in the form


`y = log_b (x)`


its equivalent exponential equation is


`x= b^y`


So converting 


`log_2 (x-1)=5`


to exponential equation, it becomes


`x-1 = 2^5`


Then, simplify the right side.


`x-1=32`


And isolate the x.


`x= 32 +1`  


`x=33`



Therefore, the solution is `x=33` .

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