![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
-X-9≤9X+10≤3X+1 Review questions in volume two of grade one
-1.9≤X≤-1.5
How to find 3x-7 / 9 = 2 / 9x
Double 9
3x-7=2x
3x-2x=7
x=7
(9x to the third power - x) divided by (3x-1)
Original formula = (9x ^ 2-1) x / (3x-1)
=(3x+1)(3x-1)x/(3x-1)
=3x^2+x (x≠1/3)
RELATED INFORMATIONS
- 1. 4X + 3 [2x-3] = 12 - [x-4] to solve the equation
- 2. Solution equation (4x / 5) * 1 / 4 + 2x / 5 = 12
- 3. Solving equation 1 / 4x + 50% x = 5 / 8
- 4. Solve the equation 3x / 4: 2 / 5 = 15 / 16: 8 / 9
- 5. What is the minimum value of the function y = - x ^ 2 + 4x - 2 in the interval [1,4], and draw its image
- 6. A stationery factory processes 2500 sets of drawing tools for students. After processing 1000 sets, it adopts new technology, which makes the daily work efficiency 1.5 times of the original. As a result, it completes the task five days ahead of time. How many sets of drawing tools for students are processed by the stationery factory every day
- 7. The time required for a ship to sail 66 km downstream is the same as that for a ship to sail 48 km upstream. Given the current velocity of 3 km / h, if the distance between AB and ab docks is 44 km, the time required for a ship to go back and forth is calculated
- 8. ① Given the quadratic equation of one variable 2x square + 3x + 5x = 0, we can find the quadratic equation of one variable whose root is the reciprocal of two of the equations ② Is there such a nonnegative integer m that there are two real roots of the equation m square x square - (2m-1) x + 1 = 0? If it exists, the value of M is requested ① Given the square of the quadratic equation 2x + 3x + 5x = 0, find the quadratic equation of one variable with the reciprocal of two of the equations as the root ② Whether there is such a non negative integer m, so that the square of the equation m with respect to x, the square of X - (2m-1) x + 1 = 0, has two real roots. If there is, the value of M is requested; if not, the reason is given.
- 9. On quadratic equation of one variable 1. It is known that m.n is the equation x2-2008x + 2009 = 0 about X, which has two real roots. Find the value of the algebraic formula (m2-2008m + 2009) 2. When finding the value of real number k, the quadratic equation X2 - (2k-3) x + 2k-4 = 0 has two positive roots 3. It is known that there are two negative roots of quadratic equation 6x2 + (M + 1) x + m-5 = 0, so we can find the value range of real number M Note: 2 after each unknown is the square I haven't thought about it for a long time. Who can accompany me to have a look
- 10. Quadratic equation of one variable 2X square + root sign 3 x = 3 use formula method to solve speed
- 11. 7(2x-1)-3(3x+5)+1=2(9x-4)
- 12. (1) - 2x ^ 2 - [(13X) - 4 (3x ^ 2-4x) + 3x ^ 2], where x = - 4 (2) 2 (- A ^ 2B + 3AB ^ 2) - 4 (AB ^ 2 + 3A ^ 2b) - 2 (AB ^ 2-2a ^ 2b) where a = - 2, B = 1 / 4
- 13. 15/3x=15/x-2/3 And 72 / 20 + x = 48 / 20-x And 1 / 2x = 1 / 4
- 14. By factoring the equation: - 3x ^ + 6x-2 = 0, the value of X can be obtained
- 15. How many roots does a cubic equation have?
- 16. Please use the root formula of cubic equation of one variable to solve the following equation: 2x ^ 3-x ^ 2-3x = 0
- 17. (2x-1)/5+(3y-2)/4=2 (3x+1)/3-(3y+2)/4=3/4
- 18. The equation x ^ 2-2mx + 2m ^ 2-1 = 0 of X has at least one negative real root, and the range of M is obtained
- 19. a. B is a rational number, and √ (7-times root sign 3) (note brackets,) is a root of the equation x ^ + ax + B = 0, find a + B If I can't do it, I'll be scolded to death I'll thank you
- 20. For any rational number a, B defines the operation "." as follows: A.B = a + b-1003.5, calculation: 1.2.3.4.5.6.2006.2007