Calculation. 1) - (2 / 3) 4 cubic 2) (4 / 5) 2 cubic

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• 1. Given the square of X + X + 1 = 0, find the cube of X - 2x + 2015
• 2. How many kilograms of dry river sand is a cubic meter
• 3. (9x quartic - 12x cubic + 54x Square) divided by 3x square
• 4. Let a = {x | x greater than or equal to - 1 less than or equal to 2}, B = {x | x greater than or equal to 0 less than or equal to 4}, then a intersects B =?
• 5. Let a = {x | (x + 2) (x-1)
• 6. Given the random variable x ~ B (6,1 / 3), what is V (x) equal to?
• 7. Let X be a random variable, e (x) = 2, e (x ^ 2) = 6, then d (x) is equal to?
• 8. Let u = R, a = {x | A-2 less than or equal to x, less than or equal to a + 10} B = {x-3 less than or equal to 6 If Au (cub) = R, find the range of A
• 9. 1-ax = 6-x (where a is not equal to 1) Try to solve the equation about X: quarter 2x-a = third x-a-half
• 10. What is the cube of x = - 125 Process, what is it
• 11. Multiply 96 by two natural numbers a and B to get a sum of squares and a cubic number. The minimum sum of the two numbers a and B is______ ．
• 12. It is known that f (x) is an odd function, G (x) is an even function, and f (x) + G (x) = 1 / (2x + 1). The analytic expression of G (x) f (x) is
• 13. 1. Let a = {x2-3x + 2 = 0} and B = {x AX-2 = 0}. If B is a proper subset of a, it is a set of A 2. Let m = {(x, y) ｜ x-a = 4}, and {(2,1), (- 2,5)} be the proper subset of M, then a=____ b=_____ 3. A = {x 2 + X + P = 0}, B = {x ≥ 0, X ∈ r}, a ∩ B = empty set, find the value range of real number P 4. Let a = {x 2 4x = 0}, B = {x 2 + 2 (a + 1) x + a 2-1 = 0, X ∈ r} (1) If a ∩ B = B, find the value of A (2) If a ∪ B = B, find the value of A 5. Let a = {x 2 + ax + B = 0}, B = {x 2 + CX + 15 = 0}, and a ∪ B = {3,5}, a ∩ B = 3, find the value of real numbers a, B, C
• 14. If the image of function f (x) passes through point (4,2), then the inverse function of function f (x + 1) passes through point? Why does the analysis say that when x + 1 = 4, that is, x = 3, y = 2, so the function f (x + 1) passes through (3,2). Why (3,2), what is the relationship between F (x + 1) and f (x)
• 15. It is known that the function f (x) defined on R satisfies f (- x) = - f (x), f (x-4) = - f (x), and is a decreasing function in the interval [0,2]. If the equation f (x) = k has four different roots in the interval [- 8,8], then the sum of the four roots is () A. ±4B. ±8C. ±6D. ±2
• 16. For the function y = f (x) defined on the set D, if f (x) has monotonicity on D and has interval [a, b] ⊆ D, so that when x ∈ [a, b], the range of F (x) is [a, b], then the function f (x) is said to be a positive function on D, and the interval [a, b] is called the "equal domain interval" of F (x). Given that the function f (x) = x is a positive function on [0, + ∞), then the equal domain interval of F (x) is___ ．
• 17. F (x) = - x ^ 2 + 2x + C the image corresponding to the analytic expression is known, and it intersects with the coordinate axis at P, Q and r Q: 1) If P, Q and R are on the same circle, find the equation of the circle 2) Try to explore the circle formed by three points passing through the fixed point (independent of C)
• 18. Mathematical problem 2x / (X-7) plus X-7 / 2x is equal to 2 2 / X-2 plus MX / X squared minus 4 is equal to 3 / x plus 2. Find m with increasing root
• 19. A mathematical problem. F (g (x)) = x + 1. G (x) = X-1. Find f (2)... Is 2 = g (x) here? Why is the point?
• 20. A mathematical problem: F (x) = x ^ 2 + PX + Q. if f (f (x)) = 0 has only one real number solution, prove P > 0, Q > 0 Pay attention to the definition field of the second layer, △ can be greater than 0