Question

Considere os vetores u = (6, 6, 1), v = (2, 3, 5), w = (-3, -4, 1). Calcule:
u x (v.w)

Answer 1

Oi Maria

u(6,6,1), v(2,3,5), w(-3,-4,1)

v.w = (-6,-12,5) 

u x (v.w) 

( x  y    z)  x   y
( 6  6   1)  6  6
(-6 -12 5) -6 -12

det = 30x - 6y - 72z + 36z + 12x - 30y = 42x - 36y - 36z 

u x (v.w) = (42, -36, - 36) 

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