Simplify the expression. If any variables are present, assume that they are positive.
? 
A. x6y8
B. x6y7
C. x6y9
D. x6y8
Answer: A
Mathematics
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Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Mathematics
Find all the second order partial derivatives of the given function.f(x, y) = 
A. 
= - 
; 
= 
; 
= 
= 
B. 
= 
; 
= - 
; 
= 
= 
C. 
= - 
; 
= 
; 
= 
= 
D. 
= - 
; 
= 
; 
= 
= 
Mathematics
Integrate the function.
A. 
B. 2tan-1 7
C. 2sin-1 7
D. 2tan-1 
Mathematics
Compute the difference. Express answer in simplest form.
- 
A. 
B. 
C. 
D. 
Mathematics