# Math Help - Coefficient problem

1. ## Coefficient problem

If any three successive coefficients in the expansion of $(1+x)^n$ are 36, 84 and 126. find n

I dont know how to begin this problem should i do a series of what ???

2. Originally Posted by TomJerry
If any three successive coefficients in the expansion of $(1+x)^n$ are 36, 84 and 126. find n

I dont know how to begin this problem should i do a series of what ???
Draw Pascal's Triangle and see which row those three numbers appear in.