[tex]\\ \sf\longmapsto f(x-1)=2x+3[/tex]
- Think about the value f(x-1) and f(-3).
- f(-3) can be written in the form of f(x-1) .
How?
[tex]\\ \sf\Rrightarrow f(-3)=f(-2-1)[/tex]
Let's find x then
[tex]\\ \sf\Rrightarrow x-1=-3[/tex]
[tex]\\ \sf\Rrightarrow x=-3+1[/tex]
[tex]\\ \sf\Rrightarrow x=-2[/tex]
- Now Substitute it in the function
[tex]\\ \sf\longmapsto f(-2-1)=2(-2)+3[/tex]
[tex]\\ \sf\longmapsto f(-3)=-4+3[/tex]
[tex]\\ \sf\longmapsto f(-3)=-1[/tex]
