The fixed points of the function f(x) = 8x^2 are x = 0 and x = ? Did you get any of these answers below?

Question

... 1, only

... -1 and +1

... 4 only

... -4 and +4

... 1/4

... 1/2

or none of these

Answer 1

I assume by fixed points you are asking for the roots or zeros of the function. Well, only plugging in 0 for x yields a 0, so that is the only root.

-T

Answer 2

There is only one fixed point. Try a curve sketch to visualise it.

Answer 3

x=0

Why?