令x-2=y,则x=y+2
f(x-2)=(x+1)^2
所以f(y)=(y+2+1)^2=(y+3)^2
所以f(x+1)=(x+1+3)^2=(x+4)^2
设X-2=t
f(t)=(t+2)^2+2(t+2)+1
即f(x)=(x+2)^2+2(x+2)+1
则f(x+1)=(x+3)^2+2(x+3)+1=x^2+6x+9+2x+6+1
=x^2+8x+16
令x-2=t得x=t+2
f(t)=(t+2)^2+2(t+2)+1=t^2+6t+9
f(x+1)=(x+1)^2+6(x+1)+9
我的理解,应该是对的
f(x-2)=x^2+2x+1 =(x+1)^2=(x-2+3)^2
=(x-2)^2+6(x-2)+9
f(x)=x^2+6x+9=(x+3)^2
f(x+1)=(x+1+3)^2=(x+4)^2
f(x-2)=(x+1)^2
f(x+1)=f(x+3-2)=(x+3+1)^2=(x+4)^2=x^2+8x+16