Thread: And more Mathematics (logarithms)

I was just wondering if someone can check my work on this problem.

Code:

 
(1/4)^x=75		//original equation
x log (1/4) = log 75	//take log of each side
x= log 75 / log (1/4)   //divide by log (1/4)
x = -3.1144		//solve

I attempted to put the resulting x value back into the following equation as a check
-75+(1/4)^x=0
and got the following answer on my check 2.14e-10

Yep, the work is right. And the value you got back checking is easily accounted for by rounding/truncating errors (10^-10 is negligible compared to the other quantities involved).

thanks for the confirmation.
slowly but surely i'm learning more skills for the code.
;0)