I have almost completed the question. I am using the mark scheme to check my answers and i have managed to correctly get to this line
-ln2 + ln1 + 4ln3 - 4ln2 - 3ln4 + 3ln3
Now the mark scheme jumps from this straight to this
-11n2 + 7ln3
Could anybody show me how this is done?
I know ln1 = 0 and the coefficients of ln can become the power but i still dont see how it works :s