1. Diketahui p = ( 1 , -3 , -1 ) q = ( 2 , 3 , 1 ) r = ( 5 , -3 , 1 ) jika a = 3p + 2q -r , maka | a | =................................ plis kak bantuint ??
Matematika
alfyananadya
Pertanyaan
1. Diketahui p = ( 1 , -3 , -1 )
q = ( 2 , 3 , 1 )
r = ( 5 , -3 , 1 )
jika a = 3p + 2q -r , maka | a | =................................
plis kak bantuint ??? yang pintar matematika
q = ( 2 , 3 , 1 )
r = ( 5 , -3 , 1 )
jika a = 3p + 2q -r , maka | a | =................................
plis kak bantuint ??? yang pintar matematika
2 Jawaban
-
1. Jawaban Machmud989
3p + 2q - r
3(1,-3,-1) + 2(2,3,1) - (5,-3,1)
a = (2,0,2)
IaI = [tex] \sqrt 2^{2} + 0^{2} + 2^{2} [/tex] = [tex] \sqrt{8} [/tex] = [tex]2 \sqrt{2} [/tex] -
2. Jawaban bagussuryam
a = 3(1, -3, -1) + 2(2,3,1)-(5, -3, 1)
= (3, -9,-3) + (4, 6, 2) - ( 5, -3, 1)
= (2, 0, -2)
|a| =√(4+0+4)
= √8
= 2√2