Solve the problem.Find the derivative of the function 
at the point 
in the direction in which the function increases most rapidly.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Determine the order of the matrix.
A. 2 × 4 B. 2 × 3 C. 3 × 2 D. 4 × 2
Mathematics
Solve and check:
Mathematics
Solve the problem by integration.By a computer analysis, the electric current i (in A) in a certain circuit is given by 
where t is the time (in s). Find the total charge that passes a point in the circuit in the first 0.25 s.
A. 0.0001 C B. 0.0009 C C. 0.0002 C D. 0.0008 C
Mathematics
Find the derivative of the function.r = 
(5 - ?)
A. 
= 
+ 5
B. 
= - 
- 1
C. 
= 
+ 1
D. 
= ?2 - 1
Mathematics