The position vector of a particle is r(t). Find the requested vector.The velocity at t = 0 for r(t) = cos(2t)i + 2ln(t - 7)j - 
k
A. v(0) = -2i - 
j
B. v(0) = -
j
C. v(0) = 
j
D. v(0) = 2i - 
j
Answer: B
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