Find the equation of the tangent plane to the given surface at the indicated point.x2 + 2yz + y2 - 3xz - z2 - 18 = 0, (1, -3, -1)

A. 5(x - 1) - 8(y + 3) + 13(z + 1) = 18
B. 5(x - 1) - 8(y + 3) - 7(z + 1) = 0
C. 5(x - 1) - 8(y + 3) = -7(z + 1)
D. 5(x + 1) - 8(y - 3) - 7(z - 1) = 0


Answer: B

Mathematics

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