Question

Dada a função f(x)=-2+3, determine: f(1) f(0) f (-3)

Answer 1

f(1) = -2.(1) + 3
f(1) = -2 + 3
f(1) = 1

f(0) = -2.(0)+3
f(0) = 0 + 3
f(0) = 3

f(-3) = -2.(-3)+3
f(-3) = 6+3
f(-3) = 9                      ok

Answer 2

f(x) = - 2x + 3 ==> f(1) = -2x1 + 3 ==> f(1)  = -2+3 ==> f(1) = 1 
==>  f(0) = -2x0 + 3 ==> f(0) = 0 + 3 ==> f(0) = 3
==> f(-3) = -2x(-3) + 3 ==> f(-3) = 6 + 3 ==> f(-3) = 9