Perform the indicated operation and, if possible, simplify.
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Find the gradient field of the function.f(x, y, z) = ex7 + y9 + z9
A. ?f = 7x6ex7 + y9 + z9i + 9y8ex7 + y9 + z9j + 9z8ex7 + y9 + z9k B. ?f = x6ex7 + y9 + z9i + y8ex7 + y9 + z9j + z8ex7 + y9 + z9k C. ?f = 7x6ex7i + 9y8ey9j + 9z8e z9k D. ?f = x7ex7 + y9 + z9i + y9ex7 + y9 + z9j + z9ex7 + y9 + z9k
Mathematics
Find all the first order partial derivatives for the following function.f(x, y) = 
A. 
= - 
; 
= - 
B. 
= - 
; 
= - 
C. 
= - 
; 
= - 
D. 
= 
; 
= 
Mathematics
Find the directrices of the ellipse.25x2 + 36y2 = 900
A. y = ± 
B. x = ± 
C. y = ± 
D. x = ± 
Mathematics
Simplify and add or subtract wherever possible.20
- 10
A. 30
B. 10
C. 10
D. 30
Mathematics