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\overset{⇀}{A} = 2 \overset{⇀}{i} + \overset{⇀}{k} ও \overset{⇀}{B} = 2 \overset{⇀}{i} + 10 \overset{⇀}{j} - 11 k

\frac{1}{\sqrt{29}} (2 \overset{⇀}{i} + 3 \overset{⇀}{j} + 4 \overset{⇀}{k})

\frac{4}{\sqrt{29}} (2 \overset{⇀}{i} + 3 \overset{⇀}{j} + 4 \overset{⇀}{k})

\frac{4}{\sqrt{29}} (4 \overset{⇀}{i} + 3 \overset{⇀}{j} + 2 \overset{⇀}{k})

\frac{1}{\sqrt{29}} (- 4 \overset{⇀}{i} + 3 \overset{⇀}{j} + 2 \overset{⇀}{k})

\frac{1}{\sqrt{29}} (- 4 \overset{⇀}{i} + 3 \overset{⇀}{j} - 2 \overset{⇀}{k})

ANS : 4

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