1) 17=37-2n
2n=20
n=10
да
2) -7=49-3n
3n= 56
n=56/3
нет
3) -104=3n-2n²
2n²-3n-104=0
D=9+832= 841
n1= (3+29)/4= 8
n2= (3-29)/4= -6,5
да, при n=8
4) 13= (4n+3)/n+1
n≠ -1
13n+13=4n+3
9n=-10
n= -10/9
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Verified answer
1) 17=37-2n
2n=20
n=10
да
2) -7=49-3n
3n= 56
n=56/3
нет
3) -104=3n-2n²
2n²-3n-104=0
D=9+832= 841
n1= (3+29)/4= 8
n2= (3-29)/4= -6,5
да, при n=8
4) 13= (4n+3)/n+1
n≠ -1
13n+13=4n+3
9n=-10
n= -10/9
нет