Find ?f.f(x, y, z) = x4y9 + 

A. F = i + 9x4y8j - k
B. F = (4x3 + 6x5)i + 9y8j - k
C. F = 4x3y9i + 9x4y8j - k
D. F = (4x3 + 6x5)i + 9y8j + k

Answer: A

Mathematics

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Find T, N, and B for the given space curve.r(t) = i  + j + 4tk

A. T = (sin 3t)i  - (cos 3t)j ; N = (-sin 3t)i - (cos 3t)j  ; B = (cos 3t)i - (sin 3t)j - k
B. T = (cos 3t)i  - (sin 3t)j ; N = (-sin 3t)i - (cos 3t)j  ; B = (cos 3t)i - (sin 3t)j - k
C. T = (cos 3t)i  - (sin 3t)j + k ; N = (-sin 3t)i - (cos 3t)j  ; B = - k
D. T = (cos 3t)i  - (sin 3t)j + k ; N = (-sin 3t)i - (cos 3t)j  ; B = (cos 3t)i - (sin 3t)j - k

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Perform the operations and simplify. ? ? Please enter the answer as a polynomial.

What will be an ideal response?

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Use the graph to determine an equation of the hyperbola.

A. 9y2 - 36x2 = 1
B. 3y2 - 6x2 = 1
C.  -  = 1
D.  -  = 1

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Mathematics

Find the center and radius of the circle.9x2 - 9x + 9y2 + 9y - 4 = 0

A. , r = 
B. , r = 
C. , r = 
D. , r = 

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Mathematics