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If the projection of 2̂i + 4̂j - 2̂k on ̂i + 2̂j + α̂k is zero. Then, the value of α will be ______.

Asked in JEE Main 28th July 1st Shift 2022 · Vector product

Answer: 5

Step-by-step solution

Zero projection means zero dot product: 2 + 8 - 2α = 0.

α = 5.

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