Given that the function y = FX defined on R satisfies f (2 + x) = 3f (x), when x ∈ [0,2], f (x) = x-2x, find f (x) when x ∈ [- 4, - 2]=

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• 1. The derivative value of the differentiable function y = f (x) at one point is 0, which is the extreme value of the function y = f (x) at this point () A. Sufficient condition B. necessary condition C. necessary and insufficient condition D. sufficient and necessary condition
• 2. The derivative value of the differentiable function y = f (x) at one point is 0, which is the extreme value of the function y = f (x) at this point () A. Sufficient condition B. necessary condition C. necessary and insufficient condition D. sufficient and necessary condition
• 3. The derivative value of the differentiable function y = f (x) at one point is 0, which is the extreme value of the function y = f (x) at this point () A. Sufficient condition B. necessary condition C. necessary and insufficient condition D. sufficient and necessary condition
• 4. If y = f (x) is a differentiable function and f '(1) = 2, then when x = - 1, the derivative value of function f (- x) is the solution
• 5. The function f (x) = AX3 + 3x2 + 2, if f '(- 1) = 4, then the value of a is equal to______ ．
• 6. If the sum of function value and derivative value of function f (x) = xlnx at x0 is equal to 1, then the value of x0 is equal to 1______ ．
• 7. Why is the derivative of y = f (x) = x equal to 1 and the derivative of y = f (x) = C equal to 0 Ask the teacher to explain to me clearly, I almost fainted
• 8. Y = g (x + at) + F (X-AT), it is proved that the second derivative of Y for t is equal to a ^ 2 times of the second derivative of Y for X
• 9. If the derivative of F (x) = (x-3) (X-6) (X-9) is not obtained, it shows that the derivative of equation f (x) is equal to zero and has several real roots
• 10. If f (x) = (x-1) (X-2) (x-3) (x-4), how many real roots does the derivative of the equation have? If f (x) = (x-1) (X-2) (x-3) (x-4), how many real roots does the derivative of the equation have I don't know how to determine the image between 1 and 2, 2 and 3, 3 and 4. I feel that there is at least one between them, not one
• 11. Let f (x) = {X-1, X ≥ 1, x, - 1
• 12. If f (x) = 2x + 1 and X is not equal to 1, find limf (x) (x tends to 1) and prove it by using ε - δ I don't know much about this
• 13. F (0) = f (1) = 0, f (1 / 2) = 1. It is proved that there is at least one point in (0,1) such that f '(x) = 1 F (x) is continuous on [0,1] and differentiable in (0,1).
• 14. Why is the proposition "when limx →∞ f (x) = 0, there is x > 0, when x > x, f (x) is bounded" wrong?
• 15. If both non-zero real numbers a and B have f (a + b) = f (a) * f (b) and if x 1, we prove that f (x) is a decreasing function
• 16. If the nonzero function f (x) has f (a + b) = f (a) &; f (b) for any real number A.B, and if x1, (1) prove that f (x) > 0 (2) prove that f (x) is a decreasing function (3) solve the inequality f (x-3) &; f (6-2x) ≤ 1 / 4 when f (4) = 1 / 16
• 17. If the non-zero function f (x) has f (a + b) = f (a) * f (b) for any real number a and B, and if X1 proves: F (x) > 0
• 18. Solving the limit of (1 + SiNx) ^ Cotx when x approaches 0
• 19. lim/(x→0)⁡3*sinx/x=
• 20. Given f (x) = (1 + x) / sinx-1 / x, let a = Lim f (x) be the value of A Given f (x) = (1 + x) / sinx-1 / x, note a = LIM (x → 0) f (x) 1. Find the value of A. answer: the value of a is 1.2. If x → 0, f (x) - A is the infinitesimal of x ^ k of the same order, find the value of constant K