Solve a few questions 1. If there is a point on the line y = - 3 / 1 x-4, the distance from P to X axis is 2, then the coordinate of point P is______ 2. If the fractional equation x-3 / X-1 = x-3 / MX has no solution, then the value of M is______

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• 1. If f (x) satisfies f (x) + 2F (1 / x) = 5x + 4 / x, then f (x)=
• 2. Explain quadratic function and power function
• 3. What is the number of a three digit number, which is 18 times the sum of hundreds, tens and ones, equal to itself?
• 4. （1） (a²+b²)²-a²b² （2） 49（a-b）²-16（a+b）² （3） a²b²-2ab+1 （4） 9-12a+4a² （5）4x²+4x+1 （6） x²-6xy+9y²
• 5. Solution equation: (2.5x + x) * 1.4 = 11.9
• 6. Through the point m (2,1), make a straight line l-intersection hyperbola x ＾ 2 - (Y ＾ 2) / 2 = 1 at two points a and B, and M is the midpoint of ab. solve the linear l-equation for detailed solution,
• 7. A total of 1 l of two gaseous hydrocarbon mixtures are burned in air to produce 1.5 l CO2 and 2 l of water vapor A must contain methane B must contain methane, not ethane C must contain ethane but not methane D must be free of ethane
• 8. If a and B are real numbers and (5a + 6) square + lb-3l = 0, find the value of a / b
• 9. The infinite discontinuity of function f (x) = X-1 / x ^ 2-1 is?
• 10. 21 vs () = 18
• 11. Factorization 2009 + 2009 ^ 2-2010 ^ 2
• 12. How to prove that the sum of the products of the elements of any column (row) of n-order determinant d = / AIJ / and the corresponding elements of another column (row) is equal to zero
• 13. The solution of the system of linear equations with one variable, removing bracket, shifting term, removing denominator and changing sign
• 14. -How to solve the problem of 4 and 7 / 8 - (+ 4 and 1 / 2) - (- 5 and 1 / 2) + (- 3 and 1 / 8) -4 and 7 / 8 - (+ 4 and 1 / 2) - (- 5 and 1 / 2) + (- 3 and 1 / 8) calculation process! As simple as possible! It's better to answer before today or tomorrow
• 15. Given X & sup2; - 4Y & sup2; = - 15, x + 2Y = 3, find the value of X and y
• 16. Decomposition factor, 25X square, quartic power + 10x square + 1
• 17. For example, 5.2-x = 1.721/x = 8.478-x = 32
• 18. Given that the corresponding number of point a on the number axis is a, and / A + 4 / + / B-1 / = 0, the distance between a and B is recorded as / AB /, and / AB / = / A-B / 1, find the length of line AB / AB /; 2. Let the number corresponding to point P on the number axis be X. when / PA / - / Pb / = 2, find the value of X
• 19. Given that the number corresponding to point a on the number axis is a, the number corresponding to point B is B, and | a + 4 | + | B-1 | = 0, the distance between a and B is recorded as | ab |, and | ab | = | A-B | 1. Let the number corresponding to point P on the number axis be X. when | PA | - | Pb | = 2, find the value of X; 2. If the point P is on the left side of a, and m and N are the midpoint of PA and Pb respectively, when P moves on the left side of a, the following two conclusions will be drawn: 1. The value of | PM | + | PN | remains unchanged; 2. The value of | PN | - | PM | remains unchanged, and only one of them is correct. Please judge the correct conclusion and find its value
• 20. Given that the number corresponding to point a on the number axis is a, the number corresponding to point B is B, and | a + 4 | + (B-1) 2 (this is the second power) = 0, the distance between a and B is recorded as | ab |, (2) Let the number corresponding to point P on the number axis be X. when PA Pb = 2, find the value of X (3) If the point P is on the left side of a, m and N are the midpoint of PA and Pb respectively, when P moves on the left side of a, the following two conclusions (1) the value of PM + PN remains unchanged; (2) the value of PN - PM remains unchanged. (1) (2) there is only one correct conclusion, judge and find its value