Resposta:
a) f(1) = 7
b) f(-1) = 9
c) f(0) = 4
d) f(3) = 37
Explicação passo a passo:
f(x) = 4x² - x + 4
a) f(1)
[tex]f(x)=4x^{2}-x+4\\f(1)=4*(1)^{2}-1+4\\f(1)=4*1+3\\f(1)=4+3\\f(1)=7[/tex]
b) f(-1)
[tex]f(x)=4x^{2}-x+4\\f(-1)=4*(-1)^{2}-(-1)+4\\f(-1)=4*1+5\\f(-1)=4+5\\f(-1)=9[/tex]
c) f(0)
[tex]f(x)=4x^{2}-x+4\\f(0)=4*(0)^{2}-0+4\\f(0)=4*0+4\\f(0)=0+4\\f(0)=4[/tex]
d) f(3)
[tex]f(x)=4x^{2}-x+4\\f(3)=4*(3)^{2}-3+4\\f(3)=4*9+1\\f(3)=36+1\\f(3)=37[/tex]
