Identify the intervals where the function is changing as requested.Decreasing
A. (-3, -2)
B. (-?, -3)
C. (-?, -2)
D. (0, -2)
Answer: A
Mathematics
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Find all the second order partial derivatives of the given function.f(x, y) = xye-y2
A. 
= 0; 
= 2xye-y2(2y2 - 3); 
= 
= e-y2(1 - 2y2)
B. 
= ye-y2; 
= 2xye-y2(y2 - 1); 
= 
= e-y2(1 - y2)
C. 
= ye-y2; 
= 2xye-y2(2y2 - 6); 
= 
= e-y2(1 - 2y2)
D. 
= 0 ; 
= 2xye-y2(2y2 - 3); 
= 
= e-y2(1 - y2)
Mathematics
Find an expression for the nth term of the arithmetic sequence. 6.5, 6.9, 7.3, 7.7, 8.1, . . .
A. an = 0.4n + 5.9 B. an = 0.3n + 6.1 C. an = 0.4n + 6.5 D. an = 0.4n + 6.1
Mathematics
Evaluate the expression.cot 450°
A. Undefined
B. 1
C. 0
D. 
Mathematics
Divide.
A. 9x6 + 3x4 + 5x2 B. 9x4 - 3x2 - 5 C. 9x4 + 3x2 + 5 D. 36x4 + 12x2 + 20
Mathematics