Question: 2. Let f(x, y) = xly - ry- - or where a E R. Given that f increases fastest at the point 2 (1, 1)

2. Let f(x, y) = xly - ry- - or where

2. Let f(x, y) = xly - ry- - or where a E R. Given that f increases fastest at the point 2 (1, 1) in the direction of the vector 7 = 3 find a. [5 marks]

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