Ngày tải lên :
22/02/2014, 13:44
... a) 12 3 03 712 5 0
A
BC(;;),(;;),(;;)− b) 013 21 11 23 17 1 019
A
BC(;;),(;;),(;;)−
c) 34753 212 3
A
BC(;;),(;;),(;;)−−−− d) 423 211 387
A
BC(;;),(;;),(;;)−−
e) 312 1 211 13
A
BC(;;),(;;),(;;)−−−− 414 074 312
A
BC(;;),(;;),(;;)−− ...
Bài 13 . Tìm m để 3 vectơ abc,, đồng phẳng:
a)
)
)
)
12 1 210 22ambmcm;;,;;,;;==+=−
b) 2 11 21 12 2 212 ammbmmcmm(;;);(;;),(;;)=+−=++=+
c)
)
)
)
12 1 212 2 ammmbmmmc;;,;;,;;=+−=−+=
d)
)
)
)
13 212 1 022abmmmcm;;,;;,;;=−=+−−=− ... b) 324007533
A
BC(;;),(;;),(;;)−−
c) 312 1 211 13
A
BC(;;),(;;),(;;)−−−− d) 013 21 11 23 17 1 019
A
BC(;;),(;;),(;;)−
e) 10 2 211 132
A
BC(;;),(;;),(;;)−−− 12 6 2 511 84
A
BC(;;),(;;),(;;)−−
Trần Só Tùng...