Fractional deformation 1、（1/3x+1/5y）/（2x-y） 2、（1/x）/（1/y） 3、（-a+b）/（a-b） 4、 x/y

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• 1. Can you tell me about this fractional distortion X-Y (Y-X) squared ---- = --------- 5Y ( ) It's messy to write That is, X-Y of 5Y = what is the square of (Y-X)?
• 2. PEP fifth grade volume I mathematics 120 page 2
• 3. The average of five consecutive natural numbers is 17. After adding two adjacent even numbers, the average is 21. What are the two even numbers?
• 4. Compilation of key knowledge points in volume 4 and volume 5 Overall, it's better to be in order
• 5. There are chickens and rabbits in a farm. If the sum of the number of chickens and rabbits is 180 and the sum of the number of legs is 480, then chickens are better than rabbits
• 6. There are 600 pear and peach trees in the orchard, of which the number of peach trees is three times that of pear trees. How many pear trees are there?
• 7. How to calculate 1.58 * 0.58 + 0.42 * 0.42 + 1.16 * 0.42 how to calculate 1.58 * 0.58 + 0.42 * 0.42 + 1.16 * 0.42
• 8. The fifth grade mathematics book 125 pages 16 questions
• 9. 1. A number 1 / 5 is 3 less than its 1 / 4. What's the number? 2. 2 / 3 of a number is equal to 5 / 7 of 4 / 9 3. 12 plus 2 / 5 of a number, and 30, find the number 4. What's the product of 2 / 3 plus 1 / 4 divided by 3 / 4? 5. The sum of the quotient of a number divided by 1 / 5 plus 1 / 2 is four and a half 6. The quotient of 7 / 13 divided by a number is equal to the product of 9 / 11 multiplied by 11 / 13 7. 1 / 3 times of a number is equal to 5 / 7 of 4 / 5 8. A number plus four is exactly equal to four times one and three fourths 9. A number minus 3 / 4 equals 2 / 3 of 1 / 2. What's the number? 10. How much less is 5 / 6 of 3 / 4 than 2? 11. 5 / 18 of a number is 20. What's 7 / 12 of this number? 12. 2 / 3 of a number is 60. What's 7 / 9 of this number? 13. 3 / 5 of a number is 48. What's 7 / 8 of this number? 14. 7 / 8 of 24 is 7 more than 2 / 7 of a number. What's the number? 15. 3 / 4 of a number is 12 more than 60. What's the number? 16. The number a is 36, and the number B is 4 / 9 of the number A. what is the sum of the two numbers a and B? 17. The ratio of a to B is 5:7. A is 30. What is B? 18. The ratio of a to B is 5:6. The sum of them is 66. What is the difference between them? 19. What is the quotient of 8 / 13 divided by 7, plus the product of 1 / 7 and 6 / 13? I'm sorry! But I hope you can answer enthusiastically! Because I'm really in a hurry! I have worked out questions 4, 10, 16, 17 and 19! You don't have to do these questions! In other words, you can do 5 less questions. (in order to avoid your confusion, I repeat that you don't have to do questions 4, 10, 16, 17 and 19! Do everything else) I've already reported all of you who won't answer well! Don't bother me!
• 10. [mathematics] when m is a value, y = MX ^ m & # 178; - 2m-1 is a quadratic function, and when x > 0, y decreases with the increase of X When m is the value, y = MX ^ m & # 178; - 2m-1 is a quadratic function, and x > 0, y decreases with the increase of X? Write the expression of the function, and answer whether the function has a maximum or a minimum? What is it? If the image of function y = ax & # 178; (a ≠ 0) passes through point (a, 1), then the value of a is ()
• 11. On the transformation of proper fraction into partial fraction sum Q (x) = (x-x1 (x-x2) -- (x-xn), then, r(x)/Q(x)=A1(x-x1)+A2/(x-x2)----+An/x-xn) Where, how to use the undetermined coefficient method to find AI (I = 1,2,3,4, --)
• 12. The basic problem of solving several formula deformations (fraction) We need 10 courses. We must be basic, In a hurry in a hurry in a hurry in a hurry in a hurry Junior high school has a "formula deformation" class, that is to give a formula, let you deformation
• 13. First fraction addition and subtraction 1.(1/x＾3-1/x＾2)×x＾3/x-1 2.x/2-x-4-x＾2/x＾2-4x+4 3.x/x+1-x＾2+1/x＾2+x 4.2/a＾2-1+1/a+1
• 14. What is the law of fraction addition and subtraction? And the law of integer exponential power
• 15. The addition and subtraction of fractions (1) Given a + B = 3, ab = 1, then the value of a / B + B / A is () (2) If x
• 16. Add appropriate formula to keep the score unchanged A-B of a + B = A & # 178; - B & # 178; + a = a + 1 of C
• 17. =I want to solve some fraction problems in the second grade of junior high school ①(5mn²)^-3/（4m³n)^-2 ② (3 under 1-2 radical) ^ 0 - (2 ^ - 1) + | - 3| ③a^-2b²*(-2²b^-2)^-2/a^-4b²
• 18. Factorization of 2x ^ 2 + 2xy-y ^ 2
• 19. In the following five polynomials, which rational number range can be factorized? And write a Book factorization process (everyone hurry up! Thank you) (1)3m(m-n)+6n(n-m) (2)x(b+c-d)-y(d-b-c)-2c+2d-2b (3)2(x-2)^2+5x-17 (4)ab-a-b-a (5)x^3-3x^2+3x-1
• 20. [(power of x) + 5x + 2] * [(power of x) + 5x + 3] Factorization!