Stage 32 · Counting, Permutations, Combinations & the Binomial Theorem
32.4.1 Starting from Expanding (a+b)^n
32.4 The Binomial Theorem and Pascal's Triangle
Point 1 of 7
32.4.1 Starting from Expanding (a+b)^n
Core ideaMultiply the n copies of (a+b) one by one, and each term is one way of choosing 'a or b' out of every bracket
Module goal. Use combination numbers to explain the expansion of (a+b)^n, master the general term and the pattern of the coefficients, and connect it to Pascal's triangle, paving the way for the binomial distribution in the next stage on probability