Question

1 va rog frumos. Va roooooooogggggg

Answer 1

1.
a) A(-3;y) € Gf => f(-3)=y => y=f(-3) => y=2•(-3)-1 => y=-6-1 => y=-7 => A = (-3; -7)
b) B(x;7) € Gf => f(x)=7 => 2x-1=7 => 2x=7+1 => 2x=8 => x=8:2 => x=4 => B=(4;7)
c) C(x;x) € Gf => f(x)=x => 2x-1=x => 2x-x=1 => x=1 => C=(1;1)