Ответ:
-1<=sin(2x)<=1
-1+2<=sin(2x)+2<=1+2
1<=(2x)+2<=3
E(f)={1;3}
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Ответ:
-1<=sin(2x)<=1
-1+2<=sin(2x)+2<=1+2
1<=(2x)+2<=3
E(f)={1;3}