Find the derivative of the function at the given value of x.f(x) = -5x - 7; x = 10
A. -50
B. -7
C. -70
D. -5
Answer: D
Mathematics
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Find all the second order partial derivatives of the given function.f(x, y) = cos (xy2)
A. 
= - y2 sin xy2; 
= 2y
; 
= 
= 2
B. 
= - y2 sin xy2; 
= 2[ sin (xy2)- 2y2 cos (xy2)] ; 
= 
= 2y [sin (xy2)-y2 cos (xy2)]
C. 
= -y4 cos xy2; 
= - 2x[2xy2 cos (xy2) + sin(xy2)]; 
= 
=
- 2y[xy2 cos (xy2) + sin(xy2)];
D. 
= y2 sin xy2; 
= 2[2y2 cos (xy2) - sin (xy2)] ; 
= 
= 2y[y2 cos (xy2) - sin (xy2)]
Mathematics
Find the derivative.
x8 - 
x4
A. 
x7 - 
x3
B. 4x7 - x3
C. 4x9 - x5
D. 4x8 - x4
Mathematics
Simplify.7(
) + 
(
)
A. 22
B. 230
C. 
D. 
Mathematics
Factor.(m + 1)(a - 8) + (m + 1)(a + 5)
A. (m + 1)(a + 13) B. (m + 1)(a - 13) C. (m + 1)(2a - 3) D. (m + 1)(a2 - 3)
Mathematics