binomial expansion (negative powers)

[lyfejx19]

part (b) help
here is the work i did so far - it's wrong

 

[Deleted member 4993]

part (b) help
here is the work i did so far - it's wrong


View attachment 18894
View attachment 18906

4/(x+4) = 1/(1 + x/4) = (1 + x/4)^-1 = 1 - x/4 + (x/4)²- .......

Similarly - fix the second term.....