Find all the second order partial derivatives of the given function.f(x, y) = cos (xy2)
A. 
= y2 sin xy2; 
= 2[2y2 cos (xy2) - sin (xy2)] ; 
= 
= 2y[y2 cos (xy2) - sin (xy2)]
B. 
= -y4 cos xy2; 
= - 2x[2xy2 cos (xy2) + sin(xy2)]; 
= 
=
- 2y[xy2 cos (xy2) + sin(xy2)];
C. 
= - y2 sin xy2; 
= 2y
; 
= 
= 2
D. 
= - y2 sin xy2; 
= 2[ sin (xy2)- 2y2 cos (xy2)] ; 
= 
= 2y [sin (xy2)-y2 cos (xy2)]
Answer: B
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Integrate the function. 
A. 
B. 
- 55
C. 553/2
D. 
Express the number in scientific notation.870,000
A. 8.7 × 105 B. 8.7 × 104 C. 8.7 × 10-4 D. 8.7 × 10-5
Use the quadratic formula to solve the equation.x2 - 28x + 196 = 0
A. {-14, 14} B. {-14} C. {14} D. {-14 - i, -14 + i}
Perform the indicated operations in the following problem.
?
?
Write your answer as a decimal numeral. By decimal numeral, we mean the system we use in everyday arithmetic.
Fill in the blank(s) with the appropriate word(s).