4) f(x) > 0 при –7 < x < -6, -4 < x < 0, 4 < x < 6, f(x) < 0 при –6 < x < -4, 0 < x < 4, 6 < x < 7; 5) xmax = -7, xmax = -2, xmax = 5, xmin = -5, xmin = 2.
55
G11A
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