As shown in the figure, in diamond ABCD, angle a = 110 degrees, e and F are the midpoint of AB and BC respectively, and EP is perpendicular to point P, then FPC=

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• 1. Known: 1 / (x ^ 2 + X + 1) + 2 / (x ^ 2 + X + 2) + 3 / (x ^ 2 + X + 3) + +x/(x^2+x+x) What is the limit of this formula when x approaches positive infinity?
• 2. In the triangle ABC, ab = AC, the vertical bisector De of AB intersects AB at point D and AC at point E, if the perimeter of the triangle ABC is 3
• 3. It is known that the absolute value vector a = 8, the absolute value vector b = 4, the angle between vector a and vector B is 60 degrees
• 4. An object is subjected to two forces of 3 N and 4 n. what is the range of the resultant force?
• 5. A and B start from a to B at the same time, and return immediately after arriving at B. when they return, their respective speeds increase by 20%. 1.5 hours after departure, the two vehicles meet. It is known that when B arrives at B, a still has 1 / 5 of the distance from a to ab. how many hours does it take a car to go back and forth between ab?
• 6. *How to calculate the formula of LG8?
• 7. Given that the value of X which makes the derivative of function y = X3 + ax2-4 / 3A 0 also makes the value of y 0, what is the value of constant a?
• 8. This is a parametric equation. To find the first and second derivatives, we need to be a little more specific, x=a cos t y=b sin t I'm in a bit of a hurry
• 9. Given f (x) = x / x-a (≠ a), if a = - 2, we try to prove that f (x) increases monotonically in X ≤ - 2
• 10. My child uses his fingers to calculate addition and subtraction in Grade 10. He doesn't want to use his fingers. I said he would not report to the mental arithmetic class. What's a good way to calculate accurately and quickly
• 11. Given the set M = {y | y = x ^ 2-1, X ∈ r} n = {x | y = √ 3-x & # 178;} then m ∩ n =? The answer I did was - 1
• 12. Quadratic function, quadratic function, inverse proportion function, positive proportion function Hi, Ayu what kind of function, eh?
• 13. I always confuse quadratic function, inverse proportion function and positive proportion function. Who can figure out a way to remember the relationship between these three functions?
• 14. 1. Positive proportion function 2. Inverse proportion function 3. Primary function 4. How to find the domain of definition of quadratic function? Is it based on the solution set, or what?
• 15. Given the intersection point P (- 3,4) of the image of a positive scale function and an inverse scale function, find the relationship between the two functions and copy the table
• 16. A problem of positive proportion function and inverse proportion function It is known that the positive scale function y = ± X and the inverse scale function y = K / X (K ≠ 0) intersect at points a and B. the positive scale function y = MX (m ≠ ± 1, m ≠ 0) intersects the inverse scale function y = K / X (K ≠ 0) at points c and D. is the length of line AB always less than the length of line CD? If not, please prove. If not, request the value range of K when the length of line AB is always less than the length of line CD
• 17. The analytic expression of the relationship between positive proportion function and inverse proportion function?
• 18. (on the comparison of positive scale function and inverse scale function) It is known that in the same rectangular coordinate system, the positive scale function y = - 3x and the inverse scale function y = - 6 / X (this is a fraction, you should understand ~) intersect two points P and m below the x-axis, point a is on the negative half axis of the x-axis, and the distance from the origin is 4, Find: (1) the coordinates of P and m (2) Area of triangle map Depressed ……
• 19. The problem of positive proportion function and inverse proportion function Given that y = Y1 + Y2, Y1 is inversely proportional to χ. When χ = 1, y = 4; when χ = 2, y is equal to 5. Find the value of Y (process) when χ = 4
• 20. The topic of positive and negative proportion function In the following relation, y is inversely proportional to X A. A person's age y is related to his height X B. The width of a rectangle is constant, and its area y is equal to its length X C. Area y and radius X of a circle D. The divisor is constant, the divisor y and the quotient X