diketahui vektor a(1,1,2) dan b(2,-1,2) maka | a+b |

VEKTOR


a + b = (1+2, 1-1 , 2+2) = (3,0,4)

Maka
|a+b|
= √3^2 + 0^2 + 4^2
=√9+16
= 5

a = ( 1, 1, 2 )
b = ( 2, - 1, 2 )
a + b = ( 3, 0, 4)

|a + b|² = 3² + 0² + 4²
|a + b|² = 9 + 0 + 16
|a + b|² = 25
|a + b| = 5 ✔️

Semoga bermanfaat....
-Prisco