Question

Dada a função f (x)=3x+5 , determine : A- f(0)B- f(1)C- f (-1)​

Answer 1

Bom, antes de tudo, vale lembrar que f(x) = y.

A - f(0)

$f(x) = 3x + 5 \\ f(0) = 3 \times 0 + 5 \\ y = 0 + 5 \\ y = 5$

B - f(1)

$f(x) = 3x + 5 \\ f(1) = 3 \times 1 + 5 \\ y = 3 + 5 \\ y = 8$

C - f(-1)

$f(x)=3x+5 \\ f( - 1) = 3 \times ( - 1) + 5 \\ y = - 3 + 5 \\ y = 2$

Espero ter ajudado ;)

Answer 2

A)

f(x)=3x+5

f(0)=3*0+5

f(0)=0+5

f(0)=>5

B)

f(x)=3x+5

f(1)=3*1+5

f(1)=3+5

f(1)=>8

C)

f(x)=3x+5

f(-1)=3*-1+5

f(-1)=-3+5

f(-1)=>2