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Let f (x) = (1 + 2x - 3x ^ 2) ^ 6 1) Items with x ^ 2 in F (x) expansion (4x ^ 2 and - 3x ^ 2) 2) The sum of coefficients of all terms in F (x) expansion 3) The sum of coefficients of all odd power terms of X in F (x) expansion The third question is still thinking. Can someone teach me the first two questions?
Let's just say that the third problem is to subtract x = plus or minus 1
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