[中學] 多項式求解
若多項式f(x)對於所有的實數x滿足f(x+1)-2f(x)+f(x-1)=x+1,
且f(0)=0,f(1)=1,求f(x)=__________。
Ans: x^3/6 + x^2/2 + x/3
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