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Binomial Theorem
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Expansion of \(\left(a+b\right)^n\) using binomial coefficients, including the general term \(\binom{n}{r}a^{n-r}b^r\) and finding the coefficient of a specified term.
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The expansion of (a+b)ⁿ
SL AA 1.9
The binomial theorem allows us expand expressions of the form (a+b)n:
(a+b)n=an+nC1an−1b1+nC2an−2b2+⋯📖
or in summation form:
(a+b)n=r=0∑n(nr)an−rbr🚫
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