Mathematics · Vector Algebra
Let a, b, and c be unit vectors. If a and b are perpendicular vectors, (a - c) · (b + c) = 0, and c = la + mb + n(a × b) where l, m, n are scalars, then n2 is equal to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1l2 + m2
- 2-2lm✓
- 32l - 2m
- 4lm + l + m
Correct answer
-2lm
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