126. GATE 2017 QUESTION ON GENERATING FUNCTION

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[prashantjoshi]

I have tried with left shift (/divide by x), if I'm not wrong, as we have a'(r) = r^2 for GF = x(1+x)/1-x)^3, a(3) - a(0) = a'(4) - a'(1) = 4^2 - 1^2 = 15

[Lunatic_Retz]

sir bilkul halwa hai apke videos dekhne ke baad