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Question

Mathematics Question on Vector Algebra

a×b2+a.b2=144|\vec{a}\times\vec{b}|^2+|\vec{a}.\vec{b}|^2=144 and a=4|\vec{a}|=4 then b|\vec{b}| is equal to

A

8

B

12

C

4

D

3

Answer

3

Explanation

Solution

The correct answer is (D) : 4.