It is known that the quadratic function y = f (x) satisfies f (- 2) = f (0) = 0, and the minimum value of F (x) is - 1 (1) If the function y = f (x), X ∈ R is an odd function, when x > 0, f (x) = f (x), find the analytic expression of the function y = f (x), X ∈ R (2) Let g (x) = f (- x) - t · f (x) + 1. If G (x) is a decreasing function on [- 1,1], the value range of real number T is obtained

It is known that the quadratic function y = f (x) satisfies f (- 2) = f (0) = 0, and the minimum value of F (x) is - 1 (1) If the function y = f (x), X ∈ R is an odd function, when x > 0, f (x) = f (x), find the analytic expression of the function y = f (x), X ∈ R (2) Let g (x) = f (- x) - t · f (x) + 1. If G (x) is a decreasing function on [- 1,1], the value range of real number T is obtained

Let f (x) = ax ^ + BX + C, where ^ is the square. F (x) can be obtained from the known conditions, and f (x) passes through the origin. (1) when x > 0, f (x) = f (x), and f (x) is an odd function. F (- x) = - f (x) can be obtained from F (x). (2) g (x) can be expressed by T and f (x). By decreasing on [- 1,1], G (x)