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1. Find the scalar product of 3i+ 8j2k with 5i + j + 2k. 2. Find the scalar product of 2i + 3j+ 4k

1. Find the scalar product of 3i+ 8j2k with 5i + j + 2k. 2. Find the scalar product of 2i + 3j+ 4k with 4i + 9j - 3k. 3. Find the scalar product of 3i+ 4j with 5j - 10k. 4. Determine the angle between 2i + j - 2k and 3i - 4j.

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