Vektor R = a + b = 3i + 5j

Diket :
Vektor 
R = a + b
R = (3)i + (5)j

Tanya :
Besar vektor, |R| = __?

Jawab :

|R| = √(3)² + (5)²
|R| = √(9 + 25)
|R| = √34

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FZA