[toán 11] khai triển Niu-tơn

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hka_12_14

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huytrandinh

[TEX](x+3)^{50}=\sum C_{50}^{k}.3^{50-k}.x^{k}[/TEX]
[TEX]=\sum a_{k}.x^{k}[/TEX]
[TEX].x=1=>(1+3)^{50}=a_{1}+a_{2}+...+a_{50}=4^{50}[/TEX]
 
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