Question

Determine o valor da função afim f(x)= -3x+4, para :
A) f(0)
B) f(0)
C) f(5/3)
D) F(K+2)

Answer 1

$f(x)=-3x+4$

a, b)

$f(0)=-3(0)+4~~\Rightarrow~~f(0)=4$.

c) $f(\frac{5}{3})=-3\cdot\dfrac{5}{3}+4~~\Rightarrow~~f(\frac{5}{3})=-5+4~~\Rightarrow~~f(\frac{5}{3})=-1$.

d)

$f(k+2)=-3(k+2)+4~~\Rightarrow~~f(k+2)=-3k-6+4~~\Rightarrow~~f(k+2)=-3k-2$

Answer 2

$\boxed{f(x)=-3x+4}\\ \\ a) \ f(0)=-3.0+4=0+4=4\\ \\ b) \ f(0)=4\\ \\ c) \ f(\frac{5}{3})=-3.(\frac{5}{3})+4=-5+4=-1\\ \\ d) \ f(k+2)=-3(k+2)+4=-3k-6+4=-3k-2$