Also i was confused.it was a wave right. Being from mechanical we have always studies waves only when the ends are bounded i.e ends must be at zero. U(x,0) = x implies u(L,0) = L. I didnt get that. Maybe its basics that i missed as i had fucked in the first paper.
Also two students from maths optional didmt show up in paper 2. The invilagator was really puzzled
