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Ответ дан
tatnik12

Ответ:3.11 D(y)=(-оо;4) U (4;+оо)

3.12 D(y)=(-oo;2)U(2;+oo)

Объяснение:

обе функци определены при всех х, кроме тех случаев, когда знаменатель не равен 0.

3.11 3х+12=0

3х=-12

х=-4

3.12 7х-14=0

7х=14

х=2


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