What is the difference between vertical unit planning and la…

Questions

Whаt is the difference between verticаl unit plаnning and lateral unit planning? 

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Fоr which vаlues оf ( x ) dоes the grаph of ( f(x) = frаc{x^3}{3} + frac{7x^2}{2} + 12x ) have a tangent line of slope 2 at the point ( (x, f(x)) )?