Find the sum of the series.
A. 
B. 
C. 
D. 
Answer: C
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Find all the second order partial derivatives of the given function.f(x, y) = (x2 + y2)7
A. fxx(x, y) = 168x2(x2 + y2)5 + 14(x2 + y2)6; fyy(x, y) = 168y2(x2 + y2)5 + 14(x2 + y2)6; fxy(x, y) = fyx(x, y) = 168xy(x2 + y2)6 + (x2 + y2)7 B. fxx(x, y) = 168x2(x2 + y2)5 + 14(x2 + y2)6; fyy(x, y) = 168y2(x2 + y2)5 + 14(x2 + y2)6; fxy(x, y) = fyx(x, y) = 168xy(x2 + y2)5 + (x2 + y2)6 C. fxx(x, y) = 168x2(x2 + y2)5 + 14(x2 + y2)6; fyy(x, y) = 168y2(x2 + y2)5 + 14(x2 + y2)6; fxy(x, y) = fyx(x, y) = 168xy(x2 + y2)5 + 14(x2 + y2)6 D. fxx(x, y) = 168x2(x2 + y2)5 + 14(x2 + y2)6; fyy(x, y) = 168y2(x2 + y2)5 + 14(x2 + y2)6; fxy(x, y) = fyx(x, y) = 168xy(x2 + y2)5 + 14xy(x2 + y2)6
Use Cramer's rule to solve the system of equations. If D = 0, use another method to determine the solution set.6x - 7y = 774x - 4y = 48
A. {(7, -5)} B. {(7, -4)} C. {(6, -4)} D. Cramer's rule does not apply since D = 0; ?
Find the range of the given function.f(x) = 3x2 + 24x + 46
A. [-4, ?) B. (-?, 4] C. [-2, ?) D. (-?, 2]
Simplify by dividing.
A. 37
B. 
C. 38
D. -38