Across
- 4. 7x^6y
- 7. useful application of Pascal's triangle
- 8. 84a^5b^2.
- 9. the triangle is also _____________.
Down
- 1. (n+1) in (x+y)^n.
- 2. coefficient for Binomial expansion.
- 3. 21 in x^5.
- 5. 1 is at the top in triangular pattern.
- 6. top row in Pascal's triangle.