Question 254427
Find the least value of the polynomial p(x) = x^4 - 4x^3 + 6x^2 - 4x + 6
p'(x) = 4x^3 - 12x^2 + 12x - 4
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Using graphs, or Excel or trial and error, the p' has only one zero, at x = 1
--> the minimum of p(x) is at x = 1, and is p(1) = 5.