Ответ:
1) + = + =
2) + + = + + = = 1
3) + + = + + = = 1 = 1
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Ну да
Ответ:
1)
+ 
= 
+ 
= 
2)
+ 
+ 
= 
+ 
+ 
= 
= 1
3)
+ 
+ 
= 
+ 
+ 
= 
= 1
= 1