Resposta :
f(x) = -2x - 5
.
b) f(3)-f(4)-f(7)
f(3) = -2(3)-5 = -11
f(4)= -2(4)-5 = -13
f(7)= -2(7)-5 = -19
Logo:
b) -11-(-13)-(-19) = -11+13+19=21
.
b) f(3)-f(4)-f(7)
f(3) = -2(3)-5 = -11
f(4)= -2(4)-5 = -13
f(7)= -2(7)-5 = -19
Logo:
b) -11-(-13)-(-19) = -11+13+19=21