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Question
Find the partial dervatives of the following functions at indicated points.
g(x, y) = 3x2 + y2 + 5x + 2, (2, – 5)
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Solution
g(x, y) = 3x2 + y2 + 5x + 2
`(delg)/(delx)` = 6x ++ 5
`(delg)/(dely)` = 2y
At (1, – 2)
⇒ `(delg)/(delx)` = 6(1) + (5)
= 11
`(delg)/(dely)` = 2(– 2)
= – 4
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