The function f (x) = AX3 + 3x2 + 2, if f '(- 1) = 4, then the value of a is equal to______ ．

F ′ (x) = 3ax2 + 6x, substituting x = - 1 into f ′ (x), we get 3a-6 = 4, a = 103

RELATED INFORMATIONS

1. 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______ ．
2. 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
3. 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
4. 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
5. 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
6. If f (0) = 0, f ′ (0) = a, then limf (x) / X is in X → 0=
7. Limf (x) = a (x → x0), if f (x) > 0, is there a > 0?
8. F (x) is invertible in positive and negative infinity, and limf '(x) = e, Lim [(x + C) / (x-C)] ^ x = Lim [f (x) - f (x-1)], find C when x →∞ The answer in my book is: Lagrange mean value theorem and the second important limit formula! The final answer is C = 1 / 2
9. If f (x) = x + B and f (1) = 0, what is B equal to?
10. F (x) = {4-x, if x is less than or equal to 0 {f (x-1) - f (X-2), if x is greater than 0, then f (3)=
11. 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
12. 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
13. 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
14. 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
15. 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]=
16. Let f (x) = {X-1, X ≥ 1, x, - 1
17. 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
18. 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).
19. Why is the proposition "when limx →∞ f (x) = 0, there is x > 0, when x > x, f (x) is bounded" wrong?
20. 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