2х=0
х=2:0
х=0
-----------
2×0=0
0=0
Ответ: х=0
F(x)=-x²
x -3 -2 -1 0 1 2 3
y -9 -4 -1 0 1 4 3
А)
3x-5=0
3x = 5
x = 5/3
б)
7x-4=0
7x = 4
x = 4/7
в)
7-x = 0
-x = -7
x = 7
г)
5-x=0
-x = -5
x = 5
д)
18-10x=0
-10x = -18
x = 1,8
е)
15-7x = 0
-7x = -15
x = 15/7
ж)
x-2x+3 = 7
x = 4
з)
2x-4x-1 =2
-2x = 3
x = -1,5
и)
3x-5=x
3x-x = 5
2x = 5
x = 2,5
к)
4x-2=x
4x-x = 2
3x = 2
x = 2/3
л)
x-3 = 2x+1
x-2x = 1+3
-x = 4
x = -4
м)
3x+2 = 5x - 7
3x-5x = -7-2
-2x = -9
x = 4,5
2^(5n+7):2^(3n-5)=2^(5n+7-3n+5)=2^(2n+12)=2^(2*(n+6))=4^(n+6)
Ответ: n+6