Question

Dada a função f: R→R, definida po f(x) = 5x – 2, determine o valor de x de modo que:
a. f(x) = 0
b. f(x) = 3
c. f(x) = -10
d. f(x) = 13

Answer 1

F(x)= 5x-2
A) f(x)=0
0=5x-2
5x-2=0
5x=0+2
5x=2
X=2/5
X= 0,4

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

C) f(x)=-10
-10=5x-2
5x-2=-10
5x=-10+2
5x=-8
X=-8/5
X=-1,6

D) f(x)=13
13=5x-2
5x-2=13
5x=13+2
5=15
X=15/5
X=3