ok i stuck guys here is the question. Consideer n infintely long straight lines. none are parrelel and no three are lines have a common intersection. show that for N>=1, the lines divide the plane into (n^2+n+2)/2. kay I am stuck kay i now base case works. I know that k=(k^2+k+2)/2 but how do relate that to k+1 lines... I am stuck. I can't get them to relate for some reason.. what the trick i am missing.