8. binomial expansion

Question 1

pascals triangle is formed by

Answer 1

adding adjacent pairs of numbers to find the numbers on the next row

Question 2

the (n + 1)th row of pascals triangle gives the coefficient in the expansion

Answer 2

(a + b)^ n

Question 3

nCr =

Answer 3

n!/r! (n-r)!

Question 4

expansion of (a + b) ^n general term

Answer 4

(n. a^n-r b^r
r)