Câu hỏi 3Tính $S=1+\frac13+\frac1{3^2}+\cdots+\frac1{3^{10}}$.$\frac32-\frac1{2\times3^{11}}$$\frac32-\frac1{2\times3^{10}}$$\frac1{2\times3^{10}}$$\frac1{3^{10}}$$\frac1{3^{11}}$