It is known that the domain of function FX is [0,4] to find the domain of Y + F (x + 3) + FX It is known that the domain of F (x) is the domain of y = f (x + 3) + F (x ^ 2)

Is there (x) after y? Is the original title y?

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1. It is known that the odd function f (x) defined on R is a decreasing function. If X1 + x2 < 0, X2 + X3 < 0, X3 + X1 < 0, then the value of F (x1) + F (x2) + F (x3)______ ．
2. Given that f (x) is an odd function and a decreasing function on (- ∞, + ∞), and X1 + x2 > 0, & nbsp; & amp; X1 + X3 > 0, X2 + X3 > 0, then the relation between F (x1) + F (x2) + F (X3) and 0 is zero______ ．
3. It is known that f (x) is an odd function on R and a decreasing function. If X1 + x2 > 0, X2 + X3 > 0, X3 + X1 > 0, then the value of F (x1) + F (x2) + F (x3) () A. Must be greater than zero B. must be less than zero C. is zero D. both positive and negative are possible
4. Let f (x) be an odd function defined on R, and f (- 1) = 0, if the inequality x1f (x1) - X2F (x2) / x1-x2 ＜ 0 pairs of interval (- infinite, 0) If any two unequal real numbers x 1 and x 2 hold, then the solution set of the inequality x f (2x) < 0 is
5. Let f (x) be an odd function defined on R, and if x ≥ 0, f (x) decreases monotonically. If x 1 + x 2 > 0, then the value of F (x 1) + F (x 2) () A. Constant negative B. equal to zero C. constant positive D. unable to determine positive or negative
6. It is known that f (x) is an odd function defined on R. when x ≥ 0, f (x) = 2x-x & sup2 (1) Finding the expression of function f (x) (2) If x ∈ [a, b], f (x) ∈ [1 / B, 1 / a], if 0
7. It is known that F X is an odd function defined on R and satisfies f (x 4) = f (x). When x ∈ (0,2), f (x) = 2x & sup2;, then f (7)=
8. It is known that f (x) is an odd function defined on R. when x ≥ 0, f (x) = x & sup2; - 2x, then
9. It is known that the function y = f (x) is an odd function defined on R. when x0, the analytic expression of F (x) is obtained (2) Are there real numbers a and B (where 0 ≤ a ＜ b) such that the value range of F (x) on [a, b] is [a, b]? If so, find out all the values of a and B. if not, explain the reason
10. Let f (x) be an odd function defined on R
11. Let f (x) be an odd function defined on R, and if x > 0, f (x) = x ^ 2-3x, then f (- 2) =?
12. Let f (x) be an odd function defined on R, and if x is greater than 0, f (x) = 3x + 1, find the analytic expression of F (x)
13. Let f (x) be an odd function defined on R, and if x > 0, f (x) = 3-2 ^ x, then f (- 2)=（ Let f (x) be an odd function defined on R, and if x > 0, f (x) = 3-2 ^ x, then f (- 2)=（
14. Let f (x) be an odd function defined on R, f (x + 3) f (x) = - 1 Since a function is an odd function defined on R, why let x = 0. F (x) = 0 such that f (x + 3) f (x) = - 1 does not hold?
15. Let f (x) be an odd function defined on R. when x < 0, f (x) = x23, then f (8)=______ ．
16. Let f (x) be an odd function, and if x is greater than 0, f (x) = x-3-2x-1, then the expression of F (x) on X ∈ R is obtained
17. If f (x) is an odd function defined on R, then
18. If f (x) is an odd function on R, and if x > 0, f (x) = the third power of X + 1, then the expression of F (x) is
19. What is the minimum value of the algebraic formula 1 / - 2-A ^ 2-2ab-b ^ 2? When the algebraic formula takes the minimum value, what conditions should a and B satisfy?
20. The minimum value of the algebraic formula √ x + √ X-1 + √ X-2 is () a.0 B.1 + √ 2 C1 D does not exist