∣a∣=26, not unit (A false).
a×b=−i^+2j^+2k^ (B true).
a⋅b=−8−1−6=−15=0, not perpendicular.
a×b=0, not parallel (D true).
Let a = 4 i - j + 3 k and b = -2 i + j - 2 k. Then (A) a is a unit vector (B) a × b = - i + 2 j + 2 k (C) a and b are parallel vectors (D) a and b…
CUET UG 2023 — Mathematics Algebra
2023mcqmedium
Let a=4i^−j^+3k^ and b=−2i^+j^−2k^. Then
(A) a is a unit vector
(B) a×b=−i^+2j^+2k^
(C) a and b are parallel vectors
(D) a and b are neither parallel nor perpendicular vectors
Choose the correct answer from the options given below :
Official previous-year question
Held on 15 Jun 2023 · Verified 13 Jul 2026.
Options
- A
(B) and (C) Only
- B
(C) and (D) Only
- C
(D) Only
- D
(B) and (D) Only
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