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W = 4I + 3K
Nilai s agar v tegak lurus (v - sw)
v × (v - sw) = 0
vv - svw = 0
vv = svw
vv = (2, -3, 6) (2, -3, 6) = 4 + 9 + 36 = 49
svw = s (2, -3, 6) (4, 0, 3) = s (8 + 0 + 18) = 26s
vv = swv
s = vv/wv
s = 49/26