How many days has it been from October 6, 2010 to today How many days are there from October 6, 2010 to today? How many days are there from October 6, 2010 to November 26, 2011? We must be accurate

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• 1. Interesting math story 20 words
• 2. The higher the pollution index, the higher or lower the level of air quality
• 3. Divide the 3-meter-long rope into 10 sections, and take the 3-meter-long rope What's the percentage
• 4. First simplify (x + 1x − 1 + 1x2 − 2x + 1) △ XX − 1, and then select a value of X that you like to calculate
• 5. (higher 1 Mathematics) we know that f (x) is a quadratic function, and f (o) = - 1, f (+ 1) = f (x) - 2x + 2, then the expression of F (x) is___ Given that f (x) is a quadratic function, and f (o) = - 1, f (x + 1) = f (x) - 2x + 2, then the expression of F (x) is___
• 6. It is known that the difference between the solution of the equation 2x + 3 = x + K and the solution of the equation x-3 = 5K is 6, and K =?
• 7. Solve the equation 2x + x = 240, 5x-x = 28
• 8. Equation 2x = 5x * 3 / 4-28
• 9. Please refer to the following example to solve the equation 2x-lx-1l-1 = 0. Example: solve the equation 2x-lxl-2 = 0 (1) when x is greater than or equal to 0, The original equation can be reduced to 2x-x-2 = 0, and the solution is x = 2 (2) When x < 0, the original equation can be reduced to 2x + X-2 = 0, and the solution is x = 2 / 3 Because x < 0, so x = 2 / 3 does not meet the conditions, rounding off, so the solution of the original equation is x = 2
• 10. Solving equation 3.2x-1.6 = 2.4
• 11. Factorization calculation 1/2（x-2)²+x-2=0 1/3(x-4)²=3
• 12. It is known that the hyperbolic focus is F1 (- C, 0), F2 (C, 0), and the straight line passing through F2 with a slope of √ (3 / 5) intersects the hyperbolic at P and Q. if op ⊥ OQ, | PQ | = 4, the hyperbolic equation is solved
• 13. Finding the negative integer solution of binary linear equation 2x + y = - 7
• 14. Given the fixed point B (3,0), point a moves on the curve X ^ + y ^ = 1, then the trajectory equation of point P in line AB is
• 15. The sum of the values of X and Y satisfying the equations 3x + 5Y = m + 2x + 3Y = m is equal to 2, and M & sup2; - quarter m + 1 (x is a letter, not a multiplication) The sum of the values of X and Y satisfying the equations 3x + 5Y = m + 2x + 3Y = m is equal to 2, and M & sup2; - quarter m + 1 (x is a letter, not a multiplication)
• 16. It is known that in the plane rectangular coordinate system as shown in the figure, ab ∥ OC, ab = 10, OC = 22, BC = 15, the moving point m starts from point a and moves along AB to point B at the speed of one unit length per second, while the moving point n starts from point C and moves along CO to point o at the speed of two units length per second. When one of the moving points moves to the end, both moving points stop moving. (1) find B (2) let the motion time be T seconds; (1) when the value of T is, the area of the quadrilateral oamn is half of the area of the trapezoidal oabc; (2) when the value of T is, the area of the quadrilateral oamn is the smallest, and the minimum area is calculated; (3) if there is another moving point P, it also moves along Ao from point m and N. under the condition of (2), the length of PM + PN is just the smallest, and the velocity of the moving point P is calculated Degree
• 17. 1,-8xy÷5x/2y 2, the square of Y + 2 / y-6y + 6 divided by (3-y) 3, - 8x squared y squared by 4Y squared / 3x divided by (- 6Z / X squared y) 4,4-b squared / a squared-6a + 9 divided by 2 + B / 3-A multiplied by 3a-9 / a squared
• 18. Let x = - 1 + T, y = 2-4t, then the distance from point (3,6) to the line is ()?
• 19. Y = x ^ 3-3ax + 2 1 "extremum? 2" to find x ^ 3-3ax + 2 = 0, what is the value of a, there are three different real roots? When do you have two different real roots? When do you have a unique root
• 20. The parabola intersects with the x-axis at points (- 2,0), (1,0), and has the same shape as the parabola y = 2x & # 178; + 3 The parabola intersects with the x-axis at points (- 2,0), (1,0), and has the same shape as the parabola y = 2x & # 178; + 3