Find the Taylor Expansion:

$\displaystyle f(x)=3x^3+2x^2+x+1$ as a polynomial in $\displaystyle x-1$ so $\displaystyle a =1$

I'm not exactly sure what the question is asking me to do with the $\displaystyle x-1$, throwing me for a loop. I know how to find the expansion if we're only looking at $\displaystyle a=1$. The $\displaystyle x-1$ is confusing the hell out of me.

Any help is greatly appreciated!!