Question

Determine a lei da função inversa de cada função dada por:
a) y=x +5
b) y=x - 4
c) y=3x
d) y=2x - 1

Answer 1

a) y = x +5
x = y + 5
y = x - 5

b) y = x - 4
x = y - 4
y = x + 4

c) y = 3x
x = 3y
y = x/3

d) y = 2x - 1
x = 2y - 1
y = x + 1/2

Answer 2

y = x +5
x = y + 5
y = x - 5
==========
y = x - 4
x = y - 4
y = x + 4
==========
y = 3x
x = 3y
y = x / 3
===========
y = 2x - 1
x = 2y - 1
y = x + 1/2