Given the function FX = x squared - 2x 2, then the relationship between F (- 1) f (1) f (2) is

Given the function FX = x squared - 2x 2, then the relationship between F (- 1) f (1) f (2) is

Check the title, missing a symbol,
If f (x) = x ^ 2-2x + 2, then: F (x) = (x-1) ^ 2 + 1,
f(-1)=5,f(1)=1,f(2)=2,
That is: F (1)

Draw the image of function f (x) = - x square + 2x + 3, and answer the following question according to the image, 1 compare the size of F (0), f (1), f (3)
2 if X1 is less than X2 is less than 1, compare the size of F (x1) and f (x2). 3 find the range of function f (x)

Although there is no graph, it can be solved, because the function f (x) = - x square + 2x + 3, when x = - B / 2A = - 2 / 2 × (- 1) = 1, the function is the largest, so f (1) > F (0) > f (3), if x1

F (1 + 2x) = 1 + x square / 1-x square f (1 / 2)=

Let 1 + 2x = 1 / 2
x=-1/4
So f (1 / 2) = (1 + 1 / 16) / (1-1 / 16) = 17 / 15