2. Suppose that f (1,2)= 3 and that the directional derivative of fat point (1,2) in the direction of the vector i +j is 0.7. Use this information to estimate f (1.1, 2.1).

Q: 1. f(x, y) = 1+ 2x/y, (3,4), v= 4î – 3ĵ |

A: According to our company policy we can answer only first question and rest can be reposted. Thanks

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