Given the production function Q = 21X + 9X² - X³,where Q = Output,and X = Input
a.At what value of X does Stage II of the production function begin?
b.At what value of X does Stage III of the production function begin?
c.At what value of X does diminishing returns set in?

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The Answer of Given the production function Q = 21X + 9X² - X³,where Q = Output,and X = Input a.At what value of X does Stage II of the production function begin? b.At what value of X does Stage III of the production function begin? c.At what value of X does diminishing returns set in?

Given the Production Function Q = 21X + 9X2 -

Given the Production Function Q = 21X + 9X² -