Оценить выражение x-y, если 6 < x < 10; -5 < y < -2.
a)
-1<x-y<3
b)
1<x-y<8
c)
-15<x-y<-8
d)
11<x-y<12
e)
8<x-y<15
a)
-1<x-y<3
b)
1<x-y<8
c)
-15<x-y<-8
d)
11<x-y<12
e)
8<x-y<15
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Ответ:
Объяснение:
6 < x < 10;
-5 < y < -2⇒2 < -y < 5
6 < x < 10
+
2 < -y < 5
_________
8 < х-y < 15
Ответе: е) 8 < х-y < 15