if the problem is y = (2x)log6(x) Then y/2x = log6(x) and 6^(y/2x) = x
Now, take the natural log of both sides to get (y/2x)ln6 = ln(x) Then y = (2x/ln6)ln(x)
Taking the derivative, we get y' = (2/ln6)ln(x) + (2x/ln6)(1/x) = (2/ln6)ln(x) + (2/ln6) = (2/ln6)(1 + ln(x))