Dados os vetores u=(1,2), v=(4,-2) e w=(6,0), determine: u.(7v+w)

Dados os vetores u=(1,2), v=(4,-2) e w=(6,0), determine: u.(7v+w)

u=(1,2), v=(4,-2) e w=(6,0)

u . ( 7 v + w )

(1,2).(7 (4.-2) + (6.0))

(1,2)((28,-14) + (6,0))

[1,2).(34,-14)

1.34+(2.-14)

34-28

= 6