請問一下有關數學多項式的問題?

2014-08-01 1:29 am
設f(x)=2x^50-3x^28+x-1,求f(x)除以x^3+1之餘式為何?

回答 (1)

2014-08-01 2:07 am
✔ 最佳答案
設f(x)=2x^50-3x^28+x-1,求f(x)除以x^3+1之餘式為何?
Sol
x^3+=1=0
x^3=-1
2x^50-3x^28+x-1
=>2(x^3)^16*x^2-3*(x^3)^9*x+x-1
=>2*1*x^2-3*(-1)*x+x-1
=>2x^2+3x+x-1
=>2x^2+4x-1




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