WEBVTT 00:00:00.735 --> 00:00:01.806 在上一个视频里我们看到 00:00:01.806 --> 00:00:03.561 我们可以采取2个方程组 00:00:03.561 --> 00:00:05.786 包含2个未知数并展现它 00:00:05.786 --> 00:00:09.119 如矩阵方程 00:00:09.119 --> 00:00:11.792 00:00:11.792 --> 00:00:13.669 00:00:13.669 --> 00:00:16.610 00:00:16.610 --> 00:00:17.845 00:00:17.845 --> 00:00:20.529 00:00:20.529 --> 00:00:21.646 00:00:21.646 --> 00:00:23.386 00:00:23.386 --> 00:00:25.230 00:00:25.230 --> 00:00:27.605 00:00:27.605 --> 00:00:29.900 00:00:29.900 --> 00:00:30.640 00:00:30.640 --> 00:00:34.331 00:00:34.331 --> 00:00:35.540 00:00:35.540 --> 00:00:37.410 00:00:37.410 --> 00:00:39.440 00:00:39.440 --> 00:00:40.878 00:00:40.878 --> 00:00:43.123 00:00:43.123 --> 00:00:44.911 00:00:44.911 --> 00:00:46.666 00:00:46.666 --> 00:00:49.197 00:00:49.197 --> 00:00:52.680 00:00:52.680 --> 00:00:53.549 00:00:53.549 --> 00:00:55.980 00:00:55.980 --> 00:00:57.300 00:00:57.300 --> 00:00:59.379 00:00:59.379 --> 00:01:00.913 00:01:00.913 --> 00:01:03.531 00:01:03.531 --> 00:01:05.533 00:01:05.533 --> 00:01:07.980 00:01:07.980 --> 00:01:10.119 00:01:10.119 --> 00:01:15.501 00:01:15.501 --> 00:01:17.847 00:01:17.847 --> 00:01:21.771 00:01:21.771 --> 00:01:26.780 00:01:26.780 --> 00:01:28.416 00:01:28.416 --> 00:01:32.559 00:01:32.559 --> 00:01:34.381 00:01:34.381 --> 00:01:36.031 00:01:36.031 --> 00:01:39.290 00:01:39.343 --> 00:01:42.114 00:01:42.114 --> 00:01:44.700 00:01:44.700 --> 00:01:48.960 00:01:48.960 --> 00:01:50.117 00:01:50.117 --> 00:01:54.871 00:01:54.871 --> 00:01:57.905 00:01:57.905 --> 00:02:00.847 00:02:00.847 --> 00:02:03.641 00:02:03.641 --> 00:02:05.639 00:02:05.639 --> 00:02:06.920 00:02:06.920 --> 00:02:08.291 00:02:08.291 --> 00:02:10.443 00:02:10.443 --> 00:02:11.919 00:02:11.919 --> 00:02:13.501 00:02:13.501 --> 00:02:14.627 00:02:14.627 --> 00:02:16.237 00:02:16.237 --> 00:02:18.963 00:02:18.963 --> 00:02:21.530 00:02:21.530 --> 00:02:22.693 00:02:22.693 --> 00:02:25.240 00:02:25.240 --> 00:02:28.551 00:02:28.551 --> 00:02:31.920 00:02:31.920 --> 00:02:35.720 00:02:35.720 --> 00:02:36.773 00:02:36.773 --> 00:02:42.705 00:02:42.705 --> 00:02:48.309 00:02:48.309 --> 00:02:52.810 00:02:52.810 --> 00:02:55.180 00:02:55.180 --> 00:02:56.986 00:02:56.986 --> 00:02:59.371 00:02:59.371 --> 00:03:01.720 00:03:01.720 --> 00:03:03.710 00:03:03.710 --> 00:03:05.175 00:03:05.175 --> 00:03:09.433 00:03:09.433 --> 00:03:15.157 00:03:15.157 --> 00:03:17.963 00:03:17.963 --> 00:03:19.680 00:03:19.680 --> 00:03:23.861 00:03:23.861 --> 00:03:26.395 00:03:26.395 --> 00:03:28.120 00:03:28.120 --> 00:03:33.520 00:03:33.520 --> 00:03:38.548 00:03:38.548 --> 00:03:40.780 00:03:40.780 --> 00:03:43.751 00:03:43.751 --> 00:03:45.666 00:03:45.666 --> 00:03:47.703 00:03:47.703 --> 00:03:49.887 00:03:49.887 --> 00:03:52.131 00:03:52.131 --> 00:03:54.143 00:03:54.143 --> 00:03:57.686 00:03:57.686 --> 00:04:00.130 00:04:00.130 --> 00:04:02.697 00:04:02.697 --> 00:04:06.530 00:04:06.530 --> 00:04:08.812 00:04:08.812 --> 00:04:09.999 00:04:09.999 --> 00:04:11.840 00:04:11.840 --> 00:04:15.716 00:04:15.716 --> 00:04:18.914 00:04:18.914 --> 00:04:22.249 00:04:22.249 --> 00:04:23.852 00:04:23.852 --> 00:04:27.891 00:04:27.891 --> 00:04:32.720 00:04:32.720 --> 00:04:36.772 00:04:36.772 --> 00:04:43.306 00:04:43.306 --> 00:04:46.596 00:04:46.596 --> 00:04:47.593 00:04:47.593 --> 00:04:49.250 00:04:49.250 --> 00:04:51.411 00:04:51.411 --> 00:04:52.470 00:04:52.470 --> 00:04:53.539 00:04:53.539 --> 00:04:54.808 00:04:54.808 --> 00:04:56.172 00:04:56.172 --> 00:04:58.115 00:04:58.115 --> 00:05:01.127 00:05:01.127 --> 00:05:05.910 00:05:05.910 --> 00:05:07.664 00:05:07.664 --> 00:05:10.125 00:05:10.125 --> 00:05:12.111 00:05:12.111 --> 00:05:14.800 00:05:14.800 --> 00:05:16.362 00:05:16.362 --> 00:05:18.274 00:05:18.274 --> 00:05:20.426 00:05:20.426 --> 00:05:23.907 00:05:23.907 --> 00:05:26.266 00:05:26.266 --> 00:05:29.885 00:05:29.885 --> 00:05:32.132 00:05:32.132 --> 00:05:33.869 00:05:33.869 --> 00:05:35.600 00:05:35.600 --> 00:05:37.780 00:05:37.780 --> 00:05:39.397 00:05:39.397 --> 00:05:41.875 00:05:41.875 --> 00:05:45.480 00:05:45.480 --> 00:05:47.553 00:05:47.553 --> 00:05:48.864 00:05:48.864 --> 00:05:49.879 00:05:49.879 --> 00:05:51.387 00:05:51.387 --> 00:05:52.841 00:05:52.841 --> 00:05:55.285 00:05:55.285 --> 00:05:57.693 00:05:57.693 --> 00:05:59.480 00:05:59.480 --> 00:06:00.836 00:06:00.836 --> 00:06:03.866 00:06:03.866 --> 00:06:05.761 00:06:05.761 --> 00:06:09.979 00:06:09.979 --> 00:06:13.297 00:06:13.297 --> 00:06:16.930 00:06:16.930 --> 00:06:21.642 00:06:21.642 --> 00:06:23.240 00:06:23.240 --> 00:06:26.560 00:06:26.560 --> 00:06:28.878 00:06:28.878 --> 00:06:31.826 00:06:31.826 --> 00:06:33.356 00:06:33.356 --> 00:06:34.571 00:06:34.571 --> 00:06:36.508 00:06:36.508 --> 00:06:39.270