January 12th, 2015, 3:03 pm
The above solution uses a simple method to calculate It-Is.Although the result looks quite correct to me, the process seems to have some problem. The last equation omit lots of terms. After t1, there should be more terms t2, t3... until t. If we write out the long series (rather than just 3 terms above) to give a strict proof, I have some difficulty to find the long series can converge to the final result Ws(Wt-Ws).
Last edited by
EdisonCruise on January 11th, 2015, 11:00 pm, edited 1 time in total.