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The vector 𝑷 ⃗=𝒂𝒊 ̂+𝒂𝒋 ̂+𝟑𝒌 ̂ and 𝑸 ⃗=𝒂𝒊 ̂−𝟐𝒋 ̂−𝒌 ̂ are perpendicular to each other. The positive value of a is : (A) 3 (B) 4 (C) 9 (D) 13 Answer: (A)3
The vector 𝑷 ⃗=𝒂𝒊 ̂+𝒂𝒋 ̂+𝟑𝒌 ̂ and 𝑸 ⃗=𝒂𝒊 ̂−𝟐𝒋 ̂−𝒌 ̂ are perpendicular to each other. The positive.The vector 𝑷 ⃗=𝒂𝒊 ̂+𝒂𝒋 ̂+𝟑𝒌 ̂ and 𝑸 ⃗=𝒂𝒊 ̂−𝟐𝒋 ̂−𝒌 ̂ are perpendicular to each other. The positive.The vector 𝑷 ⃗=𝒂𝒊 ̂+𝒂𝒋 ̂+𝟑𝒌 ̂ and 𝑸 ⃗=𝒂𝒊 ̂−𝟐𝒋 ̂−𝒌 ̂ are perpendicular to each other. The positive.The vector 𝑷 ⃗=𝒂𝒊 ̂+𝒂𝒋 ̂+𝟑𝒌 ̂ and 𝑸 ⃗=𝒂𝒊 ̂−𝟐𝒋 ̂−𝒌 ̂ are perpendicular to each other. The positive.
The vector 𝑷 ⃗=𝒂𝒊 ̂+𝒂𝒋 ̂+𝟑𝒌 ̂ and 𝑸 ⃗=𝒂𝒊 ̂−𝟐𝒋 ̂−𝒌 ̂ are perpendicular to each other. The positive.