Could anyone help me solve me the following problem please :-
Find the coefficent of x^27 in the binomial expansion of ( 3/x + x^2 )^18.
I can work my way through the initial steps but do not know how to go on from there. Thanks in advance.
Could anyone help me solve me the following problem please :-
Find the coefficent of x^27 in the binomial expansion of ( 3/x + x^2 )^18.
I can work my way through the initial steps but do not know how to go on from there. Thanks in advance.
Hello, aamiri!
We have: .
The terms are of the form: . .[1]
The terms we want are of the form: .
. . Then: .
Hence: .
It seems that there is only one term that contains
That term is: .
. . . . . . . .
. . . . . . . .
Edit: Ha! . . . This is rehash of tonio's solution . . . *blush*