Find the term independent of x in the expansion of :
To Find : term independent of x, i.e. x0
For
a=x, and N=3n
We have a formula,
Now, to get coefficient of term independent of xthat is coefficient of x0 we must have,
(x)3n-3r = x0
• 3n - 3r = 0
• 3r = 3n
• r = n
Therefore, coefficient of x0
Conclusion : coefficient of x0