Question

3. Dois vetores são dados por:
a = (4,0m)i – (3,0m)j + (1,0,)k
b = (-1,0m)i + (1,0 m)j + (4,0)k.
Determine em termos de vetores unitários, (a) a + b; (b) a – b; (c) um terceiro vetor, c, tal que a – b + c = 0

Answer 1

Bom dia

(a) a + b

a = (4,0m)i – (3,0m)j + (1,0,)k
b = (-1,0m)i + (1,0 m)j + (4,0)k.
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a+b = (3,0m)i -(2,0m)j + (5,0m)k

(b) a – b;


a = (4,0m)i – (3,0m)j + (1,0,)k
b = (-1,0m)i + (1,0 m)j + (4,0)k.
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a-b = (5,0m)i - (4,0m)j - (3,0m)k

(c) um terceiro vetor, c, tal que a – b + c = 0

a – b + c = 0

(5,0m)i - (4,0m)j - (3,0m)k + c = 0
c = (-5,0m)i +(4,0m)j + (3,0m)k

espero ter ajudado