... 1,545.106m/s D: 2,545.106m/s ^H MA 315 1D, 2A,3C,4B,5A,6A,7B, 8D, 9A,10B,11A,12B,1 3D, 1 4D, 15B,16A,1 7D, 18B,19C,2 0D, 21C,22B,23C,24B,25C,2 6D, 27B,28B,2 9D, 3 0D, 31B,32C,3 3D, 34B,35B,3 6D, 3 7D, 38C,3 9D, 40C,4 1D, 42C,43A,44C,45A,46A,47C,48A,49B,50C ... Acos( t d ) = 2M 22u Acos( t d )Z\s= =1 2 d d d [z<=603J_= + = M 1 22u u u 2Acos( t d) K0<J$"6 = + = +2 d (2k 1) d (2k 1)2eP8\r8.,"1!_ + =2 26cm d 6 ... 5:eG!L:0FfZ[)-!"./?A. D A B. FF C. ZFgF[ D. FGiải_FF FF F F5 55 55 5 5F FF F5 5C 0Z: [C F0ZF [C 0ZF [FZ [ F : : 4@ @ D D4 4T T Thd hd hdI R I...