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The coefficients corresponding to [tex]$k=0,1,2, \ldots, 6$[/tex] in the expansion of [tex]$(x+y)^6$[/tex] are:

A. [tex]$0,1,6,15,15,6,1,0$[/tex]

B. [tex][tex]$0,6,15,20,15,6,0$[/tex][/tex]

C. [tex]$1,6,15,20,15,6,1$[/tex]

D. [tex]$1,6,15,15,6,1$[/tex]


Sagot :

Let's consider the expansion of [tex]\((x + y)^6\)[/tex]. According to the Binomial Theorem, the general term in the expansion of [tex]\((x + y)^n\)[/tex] is given by:

[tex]\[ \binom{n}{k} x^{n-k} y^k \][/tex]

where [tex]\(\binom{n}{k}\)[/tex] is the binomial coefficient, defined as:

[tex]\[ \binom{n}{k} = \frac{n!}{k!(n-k)!} \][/tex]

In this case, [tex]\(n = 6\)[/tex] and we are expanding [tex]\((x + y)^6\)[/tex]. We need to find the coefficients for each term in the expansion, for values of [tex]\(k\)[/tex] ranging from 0 to 6.

Thus, we need to calculate [tex]\(\binom{6}{k}\)[/tex] for [tex]\(k = 0, 1, 2, 3, 4, 5, 6\)[/tex].

Given the results are:

[tex]\[ \begin{aligned} \binom{6}{0} &= 1, \\ \binom{6}{1} &= 6, \\ \binom{6}{2} &= 15, \\ \binom{6}{3} &= 20, \\ \binom{6}{4} &= 15, \\ \binom{6}{5} &= 6, \\ \binom{6}{6} &= 1. \end{aligned} \][/tex]

Therefore, the coefficients in the binomial expansion of [tex]\((x + y)^6\)[/tex] are:

[tex]\[1, 6, 15, 20, 15, 6, 1\][/tex]

Based on this breakdown, the correct option among the provided choices is:

C. [tex]\(1, 6, 15, 20, 15, 6, 1\)[/tex]