1、已知对一切x∈R,f(x-2)+3f(2-x)=x,求y=f(x)?
1、已知对一切x∈R,f(x-2)+3f(2-x)=x,求y=f(x)?
2、已知对一切x∈R,f(x)+2f(1-x)=x^2+x,求y=f(x)?
人气:280 ℃ 时间:2020-05-20 07:51:52
解答
1、已知对一切x∈R,f(x-2)+3f(2-x)=x,求y=f(x)令x=x+2代入得f(x)+3f(-x)=x+2 (1)再令x=-x代入得f(-x)+3f(x)=-x+2 (2)两式消去f(-x)得f(x)=-x/2+1/22、已知对一切x∈R,f(x)+2f(1-x)=x^2+x,求y=f(x)令x=1-x代入得f...两式消去XX中的两式是什么意思?消去后,就得到你要的f(x)了啊
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