Expand: 3(1-3x)^-1 + 4(2+x)^-2

[thomas49th]

Homework Statement

Expand in ascending powers of x upto and including the term x³:

3(1-3x)^{-1} + 4(2+x)^{-2}

Homework Equations

The Attempt at a Solution

Err never done it with 2 terms like above before. Any suggestions/hints

Thanks :)

 

[rock.freak667]

expand (1-3x)^{-1} up to the term in x^3 and expand (2+x)^{-2} as well up to the term in x^3, the just add them.