Question

Determine a função inversa das seguintes funções


A) Y= 2x
B) Y= x+5
C) Y= 7x-2
D) Y=2x+8
E) Y =5x-15
F) Y= 3x+7

Answer 1

A) Y= 2x ==> x = 2y ==> y = x/2

B) Y= x+5 ==> x = y  + 5 ==> y = x - 5 

C) Y= 7x-2 ==> x = 7y - 2 ==> 7y = x +2 ==> y = (x + 2)/7

D) Y=2x+8 ==> x = 2y + 8 ==> 2y = x - 8 ==> y = (x -8)/2

E) Y =5x-15 ==> x = 5y - 15 ==> 5y = x +15 ==> y = (x+15)/5

F) Y= 3x+7