Binomial expansion, power series, limits, approximations ...

To expand (a+b)n we look for the row starting with 1 and n. 1.2 Example Let’s expand (a+b)3. The row in Pascal’s triangle starting with 1 and 3 is 1 3 3 1 Therefore the expansion of (a+b)3 is (a+b)3 = a3 +3a2b+3ab2 +b3 1.3 Example Let’s expand (a+b)6. The row starting with 1 and 6 in Pascal’s triangle is the row 1 6 15 20 15 6 1 ................
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