The vector r(t) is the position vector of a particle at time t. Find the angle between the velocity and the acceleration vectors at time t = 0.r(t) = (4t2 + 6)i + (3t3 - 3t)k
A. 0
B. ?
C. 
D. 
Answer: D
Mathematics
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Use Taylor series to evaluate the limit.
A. -4 B. 4 C. 0 D. 1
Mathematics
Solve the problem.Find the second derivative of the function y = x8ln x.
A. 56x7ln x + 15x6 B. 8x6ln x + 15x6 C. 56x6ln x + 15x6 D. 56x6ln x + 7x6
Mathematics
Perform the operation. Write the answer as a fraction in lowest terms. 
+ 
A. 
B. 
C. 
D. 
Mathematics
Find the derivative of the function.
?
?
A. 
B. 
C. 
D. 
Mathematics