Find the limit.
A. ?
B. - 
C. 4
D. -?
Answer: A
Mathematics
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Solve the differential equation.y ' + y tan x = cos x, -?/2 < x < ?/2
A. y = x cos x + C cos x, -?/2 < x < ?/2 B. y = x cos x + C sin x, -?/2 < x < ?/2 C. y = x sin x + C sin x, -?/2 < x < ?/2 D. y = x sin x + C cos x, -?/2 < x < ?/2
Mathematics
Evaluate the limit if one exists.
A. 
B. 
C. 0
D. Does not exist
Mathematics
Solve the equation.-3x + 4(-2x - 7) = -31 - 8x
A. 
B. 1
C. 
D. -1
Mathematics
Perform the indicated operations.(3x - 4y)2
A. 3x2 - 24xy + 16y2 B. 9x2 - 24xy + 16y2 C. 9x2 + 16y2 D. 3x2 + 16y2
Mathematics