Chuỗi số

$$I=\int_{AB}^{ }P\left(x,y\right)dx+Q\left(x,y\right)dy$$

$$I=\int_C\left(x+y\right)ds$$

$$I=\oint_C^{ }\left(Pdx+Qdy\right)$$

$$I=1$$

$$I=2$$

$$I=3$$

$$I=4$$

$$\int_D^{ }\int_{ }\left(Q'_x-P'_y\right)dxdy$$

$$\int_D^{ }\int_{ }\left(Q'_x+P'_y\right)dxdy$$

$$\oint_LPdx-Qdy$$

$$\oint_LPx+Qy$$

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Ngọn lửa

Chuỗi

5,10,20,50,100,...

2,4,8,16,33,65,...

1, $$\frac{1}{2},\frac{1}{4},\frac{1}{8},...$$

$$\frac{1}{2},\frac{2}{3},\frac{3}{4},\frac{5}{6},\frac{6}{7},...$$

=> $$\sum_{n=1}^{\infty}u_n=S$$ (hội tụ về S)

=> $$\sum_{n=1}^{\infty}=u_n$$ phân kỳ

$$\sum_{n=1}^{\infty}\left(U_n\times V_n\right)=S\times V$$

$$\sum_{n=1}^{\infty}\left(Un-Vn\right)=S\pm T$$

$$\sum_{n=1}^{\infty}\left(U_n:V_n\right)=S-T$$

$$\sum_{n=1}^{\infty}\left(U_n\pm V_n\right)=S\pm V$$

hội họa

hội tụ

hội nhập

hội ngộ

$$\left|q\right|<1;\ \left|q\right|\le1$$

$$\left|q\right|>1;\left|q\right|\le1$$

$$\left|q\right|>1;\ \left|q\right|\ge1$$

$$\left|q\right|<1;\ \left|q\right|\ge1$$