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fx=-x2+2x+3 =-(x-1)²+4 -2≤x≤3 -9≤-(x-1)²≤0 -5≤-(x-1)²+4≤4 The range of function FX = - x2 + 2x + 3 (- 2 ≤ x ≤ 3) is [- 5,4]
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