Question: 1. Determine the first three terms in the binomial expansion of (x + y)20. 2. Determine the last three terms in the binomial expansion of

1. Determine the first three terms in the binomial expansion of (x + y)20.

2. Determine the last three terms in the binomial expansion of (x + y)15.

3. Determine the last three terms in the binomial expansion of (x + y)12.

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