5. (20%) let f(z, y)-ln(r' +1) + e2m (a) find the gradient off at the point (0,-2) (7%) b) find the directional derivative of f at the point (0,-2) in the direction of the vector (c) find the maximum value of the directional derivative at the point (0-2). (6%)

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i believe the correct answer is option 4.principalities were small territories that were run by russian rulers.

which statement correctly defines principalities in northern asia in the 1200s? principalities were small territories that were run by russian rulers.

hope i could ! : )

no idea

step-by-step explanation: