(a) Define simultaneous limit of a function of two variables. lim (6) Show that x →0 y->0 2xy 2 2 does not exist. x + y (a) Define partial derivatives of two variables. (6) Show that the function u= x3 - 3xy2
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Answer: There are four major routes by which a chemical may enter the body: Inhalation (breathing) Skin (or eye) contact. Swallowing (ingestion or eating)
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