If a / A + 2 + A / A-1 = 4a-1 / (a + 2) (A-1) holds, what is a equal to

If a / A + 2 + A / A-1 = 4a-1 / (a + 2) (A-1) holds, what is a equal to

A/(a+2)+a/(a-1)=(4a-1)/(a+2)(a-1)
A(a-1)+a(a+2)=4a-1
aA-A+a^2+2a-4a+1=0
A(a-1)+(a-1)^2=0
A=-(a-1)^2/(a-1)
So a = 1-A

Observe a list of monomials: A, the square of - A, the third power of 4A, the fourth power of - 8a
According to the rule you found, the seventh monomial is () and the nth is ()

The seventh monomial is (67th power of 64a), and the nth monomial is the nth power of (- 2) ^ (n-1) * a

Please decompose the factor: - 4A & # 178; B & # 178; + 4ab-1

－4a²b²＋4ab－1
=－[(2ab)²－4ab＋1]
=－(2ab－1)²

When a is equal to negative 5, the square of quadratic trinomial AB minus 4A plus 1 is negative 9. Then when a = 5, the value of quadratic trinomial AB is?

When a is equal to negative 5, the square of quadratic trinomial AB minus 4A plus 1 is negative 9
therefore
ab^2-4a+1=-9
-5b^2+20+1=-9
b^2=-6
When a = 5, the value of the quadratic trinomial
=5*6-4*5+1
=11

If the algebraic formula 3x ^ 2 + 2x + 3 = 7, then 6x ^ 2 + 4x + 13=
A.22
B.21
C.20
D.17

21

5x (m-2) - 4x (m-2), where x = 0.4, M = 5.5, decompose the factor first

5x(m-2)-4x(m-2),
=x(m-2)
X = 0.4, M = 5.5
0.4*(5.5-2)
=0.4*3.5
=1.4

Decompose the factor first, and then evaluate X3 (m-2) + 4x (2-m), where x = 0.4, M = 5.5

x3﹙m-2﹚+4x﹙2-m﹚,
=x³(m-2)-4x(m-2)
=x(m-2)(x²-4)
=x(m-2)(x+2)(x-2)
When x = 0.4, M = 2
Original formula = 0.4 × 3.5 × 2.4 × (- 1.6)
=-5.376

If the value of the algebraic formula 3x & # 178; - 4x + 6 is 9, then x & # 178; - 3 / 4x + 6 (write clearly...)

3x²-4x+6=9
3x²-4x=3
Divide two sides by three
x²-4/3x=1
x²-4/3x+6=1+6=7

If the inequality of degree one variable 3x-m

If 3x-m ≤ 0, then x ≤ M / 3. Therefore, if the positive integer solution of the inequality is 1, 2, 3, then 3 ≤ M / 3

If the positive integer solution of the linear inequality 3x-2 ＜ K is 1,2,3, then the value range of the solution?

3x-2＜k
The solution is x ＜ (K + 2) / 3
Namely
3＜(k+2)/3≤4
The solution is 7 < K ≤ 10
That is, the value range of K is 7 < K ≤ 10