Find a unit vector u in the direction of the given vector.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Simplify the fraction.
A. 
B. 
C. 
D. 
Mathematics
Solve.x5 + x2 ? 7x3 + 7
A. [-
, -1] ? [
, ?)
B. [-
, 
]
C. (-?, -
] ? [-1, 
]
D. [-7, ?)
Mathematics
Solve the equation. Write complex solutions in standard form.x2 - 
x = - 
A. - 
± i
B. 
± 
C. - 
± 
D. 
± i
Mathematics
Find the missing number.
? 
= 
A. 5 B. 10 C. 30 D. 40
Mathematics