Question

dada a função f: R→R definida por f (x)= -5x+1, determine :
a) f (-1)=
b) f (x)= 5

Answer 1

a) -5.(-1) + 1
5 +1
6

b) -5x + 1 = 5
-5x = 5 - 1
-5x = 4
-x = 4/5 (-1)
x = -4/5