Question

dada a função f (x)=-2x+3 determine f(1)

Answer 1

$f(x)=-2x+3\\f(1)=-2\cdot(1)+3\\f(1)=-2+3\\f(1)=1$

Answer 2

Espero ter ajudado :)
f(x)=-2x+3
f(1)=-2.1+3
f(1)=-2+3
f(1)=+1