-1 / (1 * 3), 1 / (2 * 4), - 1 / (3 * 5), 1 / (4 * 6)

RELATED INFORMATIONS

• 1. 57 of a number is 920, and this number is 920______ ．
• 2. Let the density function f (x) of the random variable X be a continuous function and its distribution function f (x), then 2F (x) f (x) is a probability density function
• 3. 13 17 19 21=( )X( )=( )
• 4. What does it mean that the area of a big circle is divided equally by a small circle
• 5. Divide the ten meter long rope into three parts, each part is a fraction of the total length, and each part is a fraction of the length
• 6. 12 kg 500 g is equal to how many G?
• 7. Digital reasoning 8 11 20 17 Give reasons
• 8. Given that f (x) is an even function defined on R, and f (x + 2) is an even function, then the period of F (x) is ---,. If f (63) = - 2, then f (1)=
• 9. As shown in the figure, when △ abcab = 7, AC = 11, point m is the midpoint of BC, ad is the bisector of ∠ BAC, and MF ‖ ad, the length of FC is______ ．
• 10. Mathematics problem consultation and write down the formula, thank you 2.3kg = 18 yuan, how much is it per gram
• 11. The known function (x) = sin (2x Pai / 6) + cos ^ 2x. (1). If f (x) = 1, find the value of sinacosa. (2) Known function (x) = sin (2x Pai / 6) + cos ^ 2x (1) If f (x) = 1, find the value of sinacosa (2) How to find the monotone increasing interval of function f (x)?
• 12. Given x ^ 2 + XY + y ^ 2 = 1, find the maximum and minimum of u = x ^ 2 + y ^ 2 ^The second power of X, for example
• 13. A good God in solving a mathematical problem helps to find the maximum and minimum value of the known function f (x) = x2-2x + 3 on [a, a + 3] I have the answer. I will discuss it in four intervals, but I don't know where the boundary of minus half comes from The four intervals are (negative infinity, - 2) [- 2, negative half] (negative half, 1)] (1, positive infinity) How did that negative half come from? (X2 is the square of x)
• 14. When - 3 ≤ x ≤ 3, find the maximum and minimum value of the function y = x ^ 2-2x-3
• 15. If x > 0, the maximum value of y = 4-2x-x is 0
• 16. The number of zeros of function f (x) = x2-2x + 3 is () A. 0B. 1C. 2D. 3
• 17. It is known that the odd function f (x) = x ^ 3 + ax ^ 2 + BX + C is an increasing function defined on [- 1,1] It is known that the odd function f (x) = x ^ 3 + ax ^ 2 + BX + C is an increasing function defined on [- 1,1] 1 find the value range of real number B; 2 if B2 TB + 1 ≥ f (x) is constant for X ∈ [- 1,1], find the value range of real number t
• 18. The odd function y = f (x) is a decreasing function defined on (- 2,2), if f (m-1) = f (2m = 1) > 0 What is the range of M? As long as it turns out
• 19. The function y = 4x + B, the area of the triangle formed by its image and two coordinate axes is 16, then the value of B is_____ . The function y = 4x + B, the area of the triangle formed by its image and two coordinate axes is 16, then the value of B is_____
• 20. In the intersection of the image of the function y = - 5 / 2Sin (4x + 2 π / 3) and the X axis, the closest point to the origin is 4X + 2 π 3 = k π, why is it equal to K π,