EC > GATE 2026 > Vector Calculus
A surface is given by z2 = 2x2 - y2 and n and -n are unit normal vectors to the surface at the point P = i + √2 k.
Which of the following vectors can be n, where i, j and k are the unit vectors along x, y and z axes, respectively?
A
i - √2 k
B
(2/3)i - (1/3)k
C
√2i - √3 k
D
(√2i - k)/√3

Correct :

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