[ ( 9/17 ) - ( 11/34 ) ] * ( 17/2 )
1) ( 9/17 ) - ( 11/34 ) = ( 18/34 ) - ( 11/34 ) = 7/34
2) ( 7/34 ) * ( 17/2 ) = 7/4 = 1,75
Ответ 1,75
----------------------------------------
√ 80 = √ ( 4 * 4 * 5 ) = 4 √ 5 ;
√ 5 ≈ 2,236
4 * 2,236 ≈ 8,944
Ответ точка N ( 2 )