Question

Dada a função: f(x) = 2x-3 . Calcule:

a) F(-1/2)

b) F(x) = 9

Answer 1

f(x) = 2x - 3

f(-1/2) = 2.(-1/2) - 3
f(-1/2) = -1-3
f(-1/2) = -4

f(x) = 9
f(x) = 2x - 3

2x - 3 = 9
2x = 9 + 3
2x = 12
x = 12/2
x = 6

Logo, f(6) = 9