- #1

lemurs

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Consideer n infinitely 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.