Problem 2. The expansion of (a + b)" where n is a positive integer may be written with the help of combination notation:
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Problem 2. The expansion of (a + b)" where n is a positive integer may be written with the help of combination notation:
Problem 2. The expansion of (a + b)" where n is a positive integer may be written with the help of combination notation: (a + b)" = a¹ + (")a²−¹b + (")a²-²b² + ... + („^₂)abn-¹ + (")b¹ = ["__(^)an-kpk Use this to expand (i) (a + b)² (ii) (1+x)
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