Calculation of two fractions Find the value range of meaningful x X2-1 of x2 + 1 Finding the value of a fraction X & # 178; + Y & # 178; of 2XY, where x = negative half, y = 2 I'm offline after 10:30. I can't raise the reward

RELATED INFORMATIONS

• 1. Please work out the fraction problem x^2-16 x ———— + —— x^2+8x 16 x-4
• 2. On the problem of fraction calculation Given a + B + C = O, find the value of a (1 / B + 1 / C) + B (1 / A + 1 / C) + C (1 / B + 1 / a) There must be a process. Thank you
• 3. If the equation x ^ 2-4x + 3M = 0 has the same root as x ^ 2-x-6m = 0, find M
• 4. It is known that x = 4, y = 2 are the solutions of the equations 2x + (m-1) y = 4, NX + y = 2, and the value of (M + n) 2007 power is obtained Don't use functions, folks
• 5. Power 2007 of (- 0.5) * power 2008 of 4 (power n of 2x) (power n of 2x)
• 6. It is known that the solution x.y of the equations x + 2Y = m, 2x + y = m + 1 satisfies x + y ≥ 0, then the value range of M is
• 7. Given that the equation 2x + y = 3nx + y = 1 and 2x + my = 2x + y = 1 have the same solution, then M + n=______ ．
• 8. If the solution of the system x + 2Y = M2X + y = 1 satisfies X-Y = 5, then the value of M is______ ．
• 9. It is known that the quadratic function y = x & # 178; - BX + B-2. Try to explain that there must be two intersections between the image of this function and the x-axis
• 10. Given that the maximum value of quadratic function y = f (x) is equal to 13, and F = (- 1) = 5, find the analytic expression of F (x)
• 11. Find a fraction 1/(1-x)-1/(1+x)-2x/(1+x^2)+(-4x^3)/(1+x^4) Seek process! Urgent, online, etc
• 12. Fraction and its operation 1. When x?, the fraction X-2 / X & sup2; - 4 is meaningful 2. When x?, the value of fraction X & sup2; - 7x-8 / | x | - 1 is 0 3. When x?, the value of fraction 1 + X & sup2 / 12-6x is negative
• 13. A few fractional operations, 1. X + 1 / X (x-1) multiplied by "what" = x ^ 2-1 / x ^ 2 2.4 / A ^ 2-1 multiplied by A-1 / 6A 3. X ^ 2-y ^ 2 / X multiplied by - x ^ 2 / (X-Y) ^ 2 =?
• 14. Eight mathematical fractions (1) Given 1 / X-1 / y = 5, find the value of fraction 3x + 5xy-3y / x-3xy-y (2) Given x + 1 / x = 3, find the value of fraction x ^ 2 + 1 / x ^ 2
• 15. (xsquare + 7x + 10) / (xsquare + 6x + 5) × (xsquare + 4x + 4) / (xsquare - x + 1) / X-2, where x = 4
• 16. A problem of mathematical fraction ① After learning fractional equation, Xiao Wang found that: A, 1 / a are the two roots of the equation x + 1 / x = a + 1 / A, please verify his conclusion. ② use a conclusion to solve the equation x + 1 / (x-1) = a + 1 / (A-1) I just need the second answer, don't copy it from Baidu, that answer is wrong
• 17. A and B go to the same wholesale market every time to buy white sugar. A's purchasing strategy is to buy 1000 yuan of sugar each time; B's purchasing strategy is to buy 1000 Jin of sugar each time. Recently, they both went to buy sugar with different prices twice. Who's the average price lower?
• 18. During the Dragon Boat Festival, a shop bought a batch of zongzi for 5000 yuan. During the festival, each box was sold at a price of 30% higher than the purchase price, and 80 boxes were sold. After the festival, each box was sold at a price of 5 yuan lower than the purchase price, and the remaining zongzi were sold out. The whole business process made a profit of 1100 yuan. For the purchase price of each box of zongzi, please use the number of boxes to set the fractional equation, not the profit
• 19. A mathematical fraction test Fill in question 15. How did you get it? Why? Because f (n) + F (1 / N) = 1 So f (2) + F (1 / 2) +... + F (n) + F (1 / N) = n-1?
• 20. A mathematical problem about fraction in grade two of junior high school When calculating a + [(bc-a ^ 2) / (a ^ 2 + B ^ 2 + C ^ 2)] (a, B, C are not equal to each other), Xiao Fang found that if a and B are exchanged, the value of this formula is unchanged; if a and C are exchanged, the value of this formula is also unchanged. For example, a + B + C = 1, the constant value is obtained Seek a clear solution process