F(x)=2x-1
1)f(3)=2.3-1=6-1=5
f(-4)=2.(-4)-1=-8-1=-9
f(0)=2.0-1=0-1=-1
f(-0,5)=2.(-0,5)-1=-1-1=-2
f(3,2)=2.3,2-1=6,4-1=5,4
2)f(x)=7, 2x-1=7, 2x=8,x=4
f(x)=-9, 2x-1=-9, 2x=-9+1,2x=-8, x=-4
f(x)=0, 2x-1=0, 2x=1, x=0,5
f(x)=-2,4, 2x-1=-2,4, 2x=-2,4+1,2x=-1,4, x=-0,7
3)f(5)=9, 2.5-1=10-1=9 bepno
f(0,3)=0,4, 2.0,3-1=0,6-1=-0,4 nebepno
f(-3)=-7, 2.(-3)-1=-6-1=-7 , bepno