Question

2)Dada a função do 1° grau f(x)=1-5x/2, calcule
a)f(0)
b)f(-1)
c)f(2)
d)f(1/5)
e)f(-3)
f)f(4)
Ajuda ae e pra hoje

Answer 1

f(x) = 1 - 5x / 2

f(0) = 1 - 5 x 0 / 2
f(0) = 1 - 0 / 2
f(0) = 1 - 0
f(0) = 1

f(-1) = 1 - 5 x (-1) / 2
f(-1) = 1 - (-5) / 2
f(-1) = 1 + 5 / 2
f(-1) = 1 + 2,5
f(-1) = 3,5

f(2) = 1 - 5 x 2 / 2
f(2) = 1 - 10 / 2
f(2) = 1 - 5
f(2) = -4

f(1/5) = 1 - 5 x 1/5 / 2
f(1/5) = 1 - 1 / 2
f(1/5) = 1 - 0,5
f(1/5) = 0,5

f(-3) = 1 - 5 x (-3) / 2
f(-3) = 1 - (-15) / 2
f(-3) = 1 + 15 / 2
f(-3) = 1 + 7,5
f(-3) = 8,5

f(4) = 1 - 5 x 4 / 2
f(4) = 1 - 20 / 2
f(4) = 1 - 10
f(4) = -9