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AS-Level Maths | Binomial Expansion
Question 1 $(a + b)^n = a^n + \dbinom{n}{1}a^{n-1}b + \cdots + \dbinom{n}{r}a^{n-r}b^r + \cdots + b^n$ Find the first four terms in the expansion in ascending powers of $x$ of (a) $(1 + x)^{10}$ (b) $(1 + 2x)^8$ (c) $\left(1 -