The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 
for r(t) = (7t - 2t3)i + 3 tan (2t)j + e5tk
A. a
= - 
?i - 48j + 25e(5/8)?k
B. a
= - 
?i - 48j + 25k
C. a
= - 
?i + 48j + 25e(5/8)?k
D. a
= 
?i + 48j + 25e(5/8)?k
Answer: C
Mathematics
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? 7 ? 2
A. 
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