joleiswan6250 joleiswan6250

14-02-2024
Physics

contestada

Let vector a and b be unit vectors such that vector|a + b| = 3. Then the value of (2a + 5b).(3a + b + a x b) is equal to
(A) 11/2
(B) 13/2
(C) 39/2
(D) 23/2

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