A = 3 / 4, B is the reciprocal of a, a is ()% of B

A = 3 / 4, B is the reciprocal of a, a is ()% of B

A is 56.25% of B
3/4÷4/3=9/16=56.25%

What's the reciprocal of two and three fourths

2 and 3 / 4 = 11 / 4
therefore
The reciprocal of 2 and 3 / 4 is 4 / 11 (4 / 11)

Remove the bracket 1. There is a "+" sign before the bracket. Remove the bracket and the "+" sign before it, and the symbols of each item in the bracket will not change
Remove the "+" sign in front of the bracket, remove the bracket and "+" sign in front of it, the symbols in the bracket do not change this sentence, I can't understand, because I just learned, so there are some places I don't understand, please forgive me, give me more advice, for example. N - (- x + y) doesn't mean that before the bracket is - will be removed? What doesn't equal to n-x-y, what is n + X-Y?
Isn't that before the brackets? Isn't that before - (- x + y)? That's to remove it! I understand it like this. I'm not very good at math, so
Please advise!

If the + sign is in front of the bracket, for example, N + (- x + y), the result of removing the bracket is N-X + y, that is to say, after the + sign outside the bracket and the bracket are removed, the result remains unchanged
If according to what you said, N - (- x + y) is preceded by a - sign, then if you want to remove the bracket and the - sign in front of it, any sign in the bracket should be opposite. The result is n + X-Y. I don't know if you understand

If log4 (3a + 4b) = log2ab, then the minimum value of a + B is ()
A. 6+23B. 7+23C. 6+43D. 7+43

∵ 3A + 4B > 0, AB > 0, ∵ a > 0. B > 0 ∵ log4 (3a + 4b) = log2ab, ∵ log4 (3a + 4b) = log4 (AB) ∵ 3A + 4B = AB, a ≠ 4, a > 0. B > 0 ∵ B = 3aa-4 > 0, ∵ a > 4, then a + B = a + 3aa-4 = a + 3 (A-4) + 12a-4 = a + 3 + 12a-4 = (A-4) + 12a-4 + 7 ≥ 2 (A-4) · 12a-4 + 7 = 43 + 7, if and only if a = 4 + 23, take the equal sign

2 (a + b) / (a-2b + 6) =?
We only learned the content before "polynomial divided by monomial". Don't go out of bounds!

This is not simplistic enough

What are the symbols of mathematical sets?

1. If a is an element of a set, then a belongs to a, denoted as a ∈ a, otherwise, a slash is drawn from right to bottom on the sign
2. If you want to write the elements of a set, write a = {...}, and write the characteristics of the elements or elements in brackets
3. If x ∈ a → x ∈ B, then set a is a subset of B, denoted as auib (UI rotates 90 ° clockwise)
4. If the elements in a and B are exactly the same, then a = B
5. The set without any elements is an empty set, denoted as & #;
6. If x ∈ a or X ∈ B, then their set is called the union of a and B, denoted as a ∪ B
7. If x ∈ A and X ∈ B, then their set is called the intersection of a and B, denoted as a ∩ B
8. We usually refer to the set of all the elements in our research problem as the complete set, denoted as U
9. If x ∈ u and X does not belong to a, then their set is called the complement of a to u, denoted as CUA
10. If x ∈ A and X does not belong to B, then their set is called the difference set of a and B, denoted as a / b
11. There are also some common number sets: n (natural number set) n + (positive integer set) Z (integer set)
Q (rational number set) r (real number set)

What is the correct pronunciation of X?

/eks/

Simple high school analytic geometry problems
Let p be the focus of hyperbola x2 / a2-y2 / B2 = 1 (a > 0, b > 0) and circle x2 + y2 = A2 + B2 in the first quadrant, where F1 and F2 are the left and right focus of hyperbola respectively. If Tan ∠ pf1f2 = 3, then the eccentricity of hyperbola is?
[in this question, the number 2 is square, the answer to this question is √ 10 / 2, but I need a detailed answer process, thank you!]

Because: C ^ 2 = a ^ 2 + B ^ 2, so the radius of the circle is C, and the intersection of the circle and the X axis is the focus of the hyperbola; because P point is on the circle, so the triangle pf1f2 is a right triangle, then Tan ∠ pf1f2 = PF2 / Pf1, because the intersection is in the first quadrant, so the distance from P point to F1

There should be multiplication distribution law and combination law in 20 percentage calculation questions, and the calculation should be simple
Don't copy it

1. Calculation 1.135 + 3.346 + 5.557 + 7.768 + 9.979=_____ 2. Calculation 1.996 + 19.97 + 199.8=_____ 3. Calculation 9.8 + 99.8 + 999.8 + 9999.8 + 99999.8=_____ 4. Calculation 6.11 + 9.22 + 8.33 + 7.44 + 5.55 + 4.56 + 3.67 + 2.78 + 1.89=_____ 1.1 + 3.3 + 5.5 + 7.7 +

Y = log2 (the square of 3x - 2x-2)

Is it to find the value range of X? If it is, then
The definition field 3x ^ 2 - 2x - 2 > 0 with logarithm
(x-1 / 3) ^ 2 > 7 / 9, i.e
|X-1 / 3 | > root 7 / 3, simplified to two sets of equations
Equations a: X-1 / 3 > = 0, X-1 / 3 > root 7 / 3,
Lianlide x > (1 + radical 7) / 3
Equations B: X-1 / 3 radical 7 / 3
Lianlide x (1 + radical 7) / 3, X