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Q.The vector a⃗+2b⃗\vec{a} + 2\vec{b} is perpendicular to a⃗−b⃗\vec{a} - \vec{b} if

a
∣a⃗∣=∣b⃗∣|\vec{a}| = |\vec{b}|
b
∣a⃗∣=2∣b⃗∣|\vec{a}| = 2|\vec{b}|
c
∣a⃗∣=5∣b⃗∣|\vec{a}| = \sqrt{5}|\vec{b}|
d
∣b⃗∣=0|\vec{b}| = 0

Correct Answer: Option C

The correct solution involves applying the fundamental concept to derive the final value step by step...

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