f(x)=a(x*x-2x+1)+b(x*x-2)+x-5為零次多項式求
f(100)=?
回答 (1)
Sol
f(x)=a(x^2-2x+1)+b(x^2-2)+x-5
=(a+b)x^2+(1-2a)x+(a-2b-5)
零次多項式
a+b=0,1-2a=0
a=1/2,b=-1/2
f(x)=1/2+1-5=-7/2
f(100)=-7/2
收錄日期: 2021-04-30 21:42:11
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