Question

si f (×) = x-7 sobre x+2 entonces f (a+9) queda ?

Answer 1

F(x) = (x - 7)/(x + 2)

F(a + 9) en F(x)

F(x) = (x - 7)/(x + 2)
F(x) = (a + 9 - 7)/(a + 9 + 2)
F(x) = (a + 2)/(a + 11)