I had this in the calculus section in a different context. Although the calculus part of the question was answered (I new that anyway) I am still non the wiser regarding the partial fraction.
Can somebody show me the steps in converting this to a partial fraction?
(k-1)/2^(k+1)
Dear HallsofIvy,
You are correct. But I remember trying to decompose these kind of partial fractions when I was doing my advanced level exams. In our case these were used in finding the sum of a series. For example a series with the general term , we decomposed this into partial fractions as above and easily found the sum since there are similar terms which cancel off. Therefore I assumed that possibly p75213 want to decompose this for similar reasons. However if I am wrong many apologies.