Question

高一数学！~

已知函数f（x+1）=3x+2，则f（x）的解析式是————

希望能给出详细点的过程噢

Answer 1

令x+1=t，则x=t-1
f(t)=3(t-1)+2=3t-1
所以f(x)=3x-1

Answer 2

设t =x+1,则x=t-1.的f(t)=3*(t-1)+2=3t-1.所以f(x)=3x-1

Answer 3

f（x+1）=3x+2

f(x)=3(x-1)+2
=3x-3+2
=3x-1

Answer 4

f(x+1)=3x+2
=3(x+1)-1
所以f（x）=3x-1

Answer 5