Find the domain of f.f(x) = 
A. All real numbers
B. {x | x ? 7, x ? -4}
C. {x | x ? ±1}
D. {x | x ? -7, x ? 4}
Answer: C
Mathematics
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Find all local extreme values of the given function and identify each as a local maximum, local minimum, or saddle point.
A. f
= - 
, saddle point; f
= - 
, saddle point
B. f
= - 
, saddle point
C. f
= - 
, local minimum; f
= - 
, local minimum
D. f
= 
, local maximum
Mathematics
Find the derivative of the given function.5 cos-1 2xy + x2 = 3
A. 
B. 
C. 
D. 
Mathematics
Simplify.0.2 × {2.4 × 12.5 - [(9 - 5.8) ÷ 0.8]}
A. 5.2 B. 5.65 C. 2.0 D. 4.08
Mathematics
Graph the inequality.y ? x - 4
A. 
B. 
C. 
D. 
Mathematics