已知函数f（x）=3x²-6x+1则f（x+1）=

已知函数f（x）=3x²-6x+1则f（x+1）=
已知函数f（x）=3x²-6x+1则f（x+1）=

已知函数f（x）=3x²-6x+1则f（x+1）=
3(x^2+2x+1)-6(x+1)+1
=3x^2+6x+3-6x-6+1
=3x^2-2

吧X换成X+1往式子里代就行了 得—2

原式=3(x+1)²-6(x+1)+1
=3x²-2