Find a formula for the n Superscript th partial sum of the series 2 plus two sevenths plus StartFraction 2 Over 49 EndFraction plus StartFraction 2 Over 343 EndFraction plus times times times plus StartFraction 2 Over 7 Superscript n minus 1 EndFraction plus times times times and use it to find the series' sum if the series converges.

Is there a direction u in which the rate of change of f(x, y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.