When x is equal to, x + 1 is equal to x minus 1 RT

Is it three thirds (x + 1), yes, x = eight out of seven; not x = 0

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1. X minus one part of X is equal to t, and the algebraic expression containing T is used to express X I mean, for example, if x minus one equals T, then x equals t plus one
2. Given a + B = 5, ab = 3, then the value of the algebraic formula a3b-2a2b2 + AB3 is______ ．
3. Given a + B = 23, ab = 2, find the value of the algebraic formula A2B + 2a2b2 + AB2
4. Given a + B = 5, A-B = 3, find the value of the algebraic formula A & sup3; b-2a & sup2; B & sup2; + AB & sup3
5. If x = (Y-1) / (y + 2), then y is expressed as y by the algebraic expression of X=_______
6. 1. It is known that a, B and C are not equal to each other Find 2a-b-c / (a-b) (B-C) + 2b-c-a / (B-C) (B-A) + 2c-a-b / (C-A) (C-B) =? (/ is a fractional line) 2. It is known that 1 / A + 1 / B + 1 / C is not equal to 0 The solution equation is: x-a-b / C + x-b-c / A + x-c-a / B + 3 It's better to be careful I'm very sorry. I missed it~ x-a-b/c+x-b-c/a+x-c-a/b+3=3
7. A / | a | + | B | / B + C / | C | = 1, then the value of (| ABC | / ABC) ^ 2006 / (BC / | ab | · AC / | BC | · AB / | AC |) is________ .
8. Solution 1: given that X: Y: z = 3:4:5, and 3x-4y + Z = - 4, find the value of formula x-3y + 5Z. 2 a batch of manuscripts, a copy 30 hours, B copy 20 hours, now from a copy 3 hours later to B copy the rest, ask B how many hours still need to copy (equation solution)
9. Given 3x = 5Y, 4x = 5Z, find the ratio of X and Z. find X: Y: Z Speed before 8:30! 1
10. Given that the definition field of function FX is (0, positive infinity) and f (XY) = f (x) + F (y), f (1 / 2) = 1, find f (2) Forget to ask f (4) F8 ()
11. Given x ^ 2-x-1 = 0, find the value of the algebraic formula x ^ 3-x ^ 2-3x + 2008
12. Given x ^ 2-3x + 1 = 0, find the value of algebraic formula x ^ 4 + 1 / x ^ 4 Such as the title
13. Known: x ^ 2-3x + 1 = 0, find: algebraic formula x ^ 2 + 1 / x ^ 2 and x ^ 4 + 1 / x ^ 4 value
14. Calculation: 5x-2 [3x-2 (3x + 1)]
15. It is known that x = 2, y = 1 is the solution of the binary linear equations ax + by = 7, ax by = 1 about x.y=————
16. In the triangle ABC, extend AC to point F so that CF = 2 / 1Ac, D and E are the midpoint of edge AB and BC respectively. Prove DC = EF
17. It is known that in RT triangle ABC, D is the midpoint of hypotenuse AB, de / / BC, EF / / DC
18. As shown in the figure, in RT △ D is the midpoint of the hypotenuse AB, f is the midpoint of AC, EF ‖ DC, intersects the extension line of BC at point E, and proves that the quadrilateral befd is isosceles trapezoid
19. It is known that the area of triangle ABC is 42.3 square centimeters, which is six times of the area of triangle EFB, and the area of parallelogram efcd
20. In triangle ABC, CD is the angular bisector, CF is the outer angular bisector, DF is parallel, BC intersects AC and E, CF intersects F, and de = EF is proved