Mathematics · Vector Algebra
Given vectors a = i + 4j + 2k, b = 3i - 2j + 7k, and c = 2i - j + 4k. A vector d is parallel to the vector a × b and satisfies the condition c · d = 15. Then d is given by:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 130i - 3j + 7k
- 290i + j - 7k
- 390i - 3j - 42k✓
- 430i - j - 14k
Correct answer
90i - 3j - 42k
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