Multiply.(x + 4y)(x - 6y)
A. x2 - 5xy - 24y2
B. x - 2xy - 24y
C. x2 - 2xy - 2y2
D. x2 - 2xy - 24y2
Answer: D
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Find all the second partial derivatives.f(x, y) = xy2 + yex2 + 5
A. 
= 2yex2; 
= 2x; 
= 
= 2xex2
B. 
= 2yex2; 
= 2x; 
= 
= 2y + 2xex2
C. 
= yex2(1 + 2x2); 
= x; 
= 
= y + xex2
D. 
= 2yex2(1 + 2x2); 
= 2x; 
= 
= 2y + 2xex2
Determine if the series converges or diverges. If the series converges, find its sum.
A. converges; - 
B. diverges
C. converges; 
D. converges; ?
Solve the equation and check your solution.
= 15
A. n = 16 B. n = 30 C. n = 7 D. n = 17
For the given functions f and g, find the requested function and state its domain. Write the domain in interval notation.f(x) = 5x3 + 3; g(x) = 3x2 + 2;
Find f ? g.
A. (f ? g)(x) = 15x5 + 10x3 + 9x2 + 6; (-?, ?) B. (f ? g)(x) = 15x6 + 10x3 + 9x2 + 6; (-?, ?) C. (f ? g)(x) = 5x3 + 3x2 + 6; (-?, ?) D. (f ? g)(x) = 15x5 + 10x3 + 9x2 + 6; (-?, 0) ? (0, ?)