Question

Dada a função F(x)= -2x+3, calcule:
a)- f (×)= 3
b)- f (x)= 1
c)- f (×)= -7
d)- f (×)= 0

Answer 1

a) 3= -2x+3
3-3=-2x
0=-2x
x=0/2
x=0

b) 1=-2x+3
1-3=-2x
-2=-2x
x=-2/-2
x=+1

c) -7=-2x+3
-7-3=-2x
-10=-2x
x=-10/-2
x=5

d) 0=-2x+3
-2x=-3
x=-3/-2
x= 3/2