hmmmmmm…..mwuahahaha I got a question for ya! it aint much hard ofc.

Q. OF. THE DAY 1-

.Q. \sum_{a}^{50} are\ coefficients\ of\ polynomial (1+x+x^2)^{25}.\ prove\ that\ the\ sum\ \sum_{a}^{50}\ is\ even. [I=1 in summation(s)].