Sonika posted an Question
September 19, 2020 • 18:23 pm 30 points
  • CSIR NET
  • Mathematical Sciences

Xy 21. let f(x, y)= x *y? if +y 0 0 if x= y = 0 then (a) fx, y) is not continuous at (0, 0) (b) f, and f, exist and continuous at (0, 0) (c) f is differentiable

xy 21. Let f(x, y)= x *y? if +y 0 0 if x= y = 0 Then (A) fx, y) is not continuous at (0, 0) (B) f, and f, exist and continuous at (0, 0) (C) f is differentiable at (0, 0) (D) The directional derivative of f at (0, 0) along (1, 2) exist.

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  • Priyadarshan Choursiya best-answer

    see attachment for direction derivative https://youtu.be/2FlWyTyLxTo all are incorrect

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    part of directiona derivative is not clear what is the exact value of DD . you left it somewhere . and one doubt fx is partial derivative of f with respect to f in case of two varable function . in case of two variable there is always partial der. not simple derivative ?????

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