Ví dụ về vi tích phân 2b

                                                                       ng   th    du o       cu                                                                 CuuDuongThanCong.com                                                 u  an  co  ng c om                                                                                 https://fb.com/tailieudientucntt                                                                                                                                                                                                             ng th                    du o                      cu           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                co      c om      ng                                                                                 https://fb.com/tailieudientucntt