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У=-3х-1
-16=-3*-5-1
-16=15-1
-16=14
Не верное равенство
Точка А не принадлежит
3-2=1 7+?-132141 потом 3=3=3=3=
Y=-2/x, x≠0
y´=-2ln/x/ ili y´= 2/x²
y=cos2x
y´=-sin2x . (2x)´=-2sin2x