A matrix, A, corresponding to a system of linear equations and the matrix rref(A) obtained after the Gauss-Jordan elimination method is applied to A, are given. Write the system of linear equations corresponding to A, and use rref(A) to give all solutions of the system of linear equations. A = ; rref(A) =

A.

z = any value, y = 5 + 4z, x = 3 - 2z
B.

z = 0, y = 5, x = -3
C.

z = any value, y = 5 - 4z, x = -3 + 2z
D.

z = any value, y = 5 - 4z, x = -3 + 2z

Answer: D

Mathematics

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Find the potential function f for the field F.F = sec2 x sin2 yi + 2 tan x sin y cos yj + 9z8k

A. f(x, y, z) = sec x sin2 y + z9 + C B. f(x, y, z) = sec x sin2 y + z + C C. f(x, y, z) = -sec x sin2 y + z9 + C D. f(x, y, z) = tan x sin2 y + z9 + C

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Mathematics