Solve the problem.If v = -2i - 4j + k and u = 2i - 5j + 5k, find a vector perpendicular to both v and u.
A. 20i + 27j + 19k
B. 7i + 3j + 26k
C. -15i + 12j + 18k
D. -7i - 3j + 3k
Answer: C
Mathematics
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A. 
+ 
B. 
+ 
C. 
+ 
D. 
+ 
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A. 
B. 4
C. 6
D. 
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Find the exact value of the real number y.y = arctan 
A. 
B. 
C. 
D. 
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Evaluate the improper integral. If the integral does not converge, state that the integral is divergent.
dx
A. -2 B. -4 C. 0 D. Divergent
Mathematics