Find the extremal values of the functions (a) y = x 2 + x + 1 (b)
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Find the extremal values of the functions
(a) y = x2 + x + 1
(b) y = 3x2 – 2x – 1
(c) y = 4 + 3x – x2
(d) y = 2x – 1 – 2x2
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