Question

dada a função f R ---> R definida por f(x) 2x-7 calcule

f(2)=
f(x)= -5
f(3)=
f(x)=3

Answer 1

a) f(2) = 2*2 - 7 = -3

b) 2x - 7 = -5

2x = -5 +7 = 2

x = 2/2

x = 1

c) f(3) = 2*3 - 7 = -1

d) 2x -7 = 3

2x = 3 + 7 = 10

x = 10/2

x =5