... ()()() 121 21022ambmcm;;,;;,;;==+ =- rrr b) 2 1121 122 212 ammbmmcmm(;;);(;;),(;;)= +-= ++=+rrr c) ()()() 121 2122 ammmbmmmc;;,;;,;;= +-= -+ =rrr d) ()()()13 2121 022abmmmcm;;,;;,;; =-= + =- rrr Baøi ... 3 2121 1ab(;;),(;;) =-= - rr Baứi 8. Tỡm vect ur, bit rng: a) 2131323245 1120 abcauubuc(;;),(;;),(;;).,.,.ỡ =-= - =- ớ =-= -= ợrrrrrrrrr b) 23 1123 2116abcuaubuc(;;),(;;),(;;),,.ỡ =-= - =- ớ^^ =- ợrrrrrrrrr ... AH ca DABC. a) 123 03 71 25 0ABC(;;),(;;),(;;) - b) 01321 1123 171 019ABC(;;),(;;),(;;) - c) 3 475 3 2123 ABC(;;),(;;),(;;) d) 4232113 87 ABC(;;),(;;),(;;) e) 3121 21113ABC(;;),(;;),(;;)...