Textile Engineering > GATE 2009 > Calculus
The absolute value of the directional derivative of the surface given by
x2/1 + y2/4 + z2/9 = 3
at P(1,2,3) in the direction of the line OP, where O denotes the origin, is
A
3/√14
B
√14/3
C
6/√14
D
√14/6

Explanation

Correct : c

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