Question

Find the 7th term of (x^2 + 3y)^9

Answer 1

looks like a pascal

Answer 2

given: \[(p+q)^n\]
we can work out the middle stuff as:\[p^{n-c}q^c\]
the coeeficient is a little tricker unless you know about combinatorics

Answer 3

and c is the "term" value :)

Answer 4

n choose c is what i think i recall for the coeff; or else draw up the pascal triangle

Answer 5

This is the working formula.