Perform the indicated operation.(4a3b5 - 6a4b2 + 8ab3 - 9ab + 14) - (12b5a3 - a4b2 + 16ab3 - 5)
A. -8a3b5 - 5a4b2 + 8ab3 + 9ab + 17
B. -8a3b5 - 5a4b2 - 8ab3 - 9ab + 19
C. 8a3b5 - 5a4b2 - 24ab3 - 8ab + 9
D. -5a3b5 - 8a4b2 - 24ab3 - 9ab + 9
Answer: B
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Find the unit vector in the same direction as the given vector.v = 3i + j
A. u = 
i + 
j
B. u = 
i + 
j
C. u = 
i + 
j
D. u = 3
i + 
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