Given \(\vec{a}\) = 2\(\vec{i}\) + \(\vec{j}\) – 8\(\vec{k}\) and \(\vec{b}\) = \(\vec{i}\) + 3\(\vec{j}\) – 4\(\vec{k}\) then |\(\vec{a}\) + \(\vec{b}\)|= …………..
A. 13
B. \(\frac{13}{3}\)
C. \(\frac{4}{13}\)
D. \(\frac{3}{13}\)
Answer:A
Given \(\vec{a}\) = 2\(\vec{i}\) + \(\vec{j}\) – 8\(\vec{k}\) and \(\vec{b}\) = \(\vec{i}\) + 3\(\vec{j}\) – 4\(\vec{k}\) then |\(\vec{a}\) + \(\vec{b}\)|= …………..
A. 13 B. \(\frac{13}{3}\) C. \(\frac{4}{13}\) D. \(\frac{3}{13}\)