3 2 5 4 7 ( )

3 2 5 4 7 ( )

Fill in 6
0 + 3 = 3,3-1 = 2,2 + 3 = 5,5-1 = 4,4 + 3 = 7
0+3=3,3-1=2,2+3=5,5-4=1，4+3=7，7-1=6
Add three and subtract one. The answer is six
6. Follow up: 4 / 1 5 / 2 7 / 5 1 14 / 17 ()
A and B each have several books. If a gives B one, then B's books are twice as many as a's. If b gives a one, then a and B's books are equal. How many books did a and B have?
Let a have X copies and B have y copies
Set up the equation according to the meaning of the title
x-1=(y+1)/2
y-1=x+1
The simultaneous solution is x = 5, y = 7
A 5 copies B 7 copies
Let a have X books and B have y books
If Party A gives Party B one copy, the book of Party B is twice that of Party A
Equation y + 1 = 2 (x-1) ······ ①
Condition 2: if Party B gives party a one book, the books of Party A and Party B are equal
Equation Y-1 = x + 1 ······················· ②
Solve the equation and get x = 5, y = 7
Let a have X books and B have y books
2*(X - 1) = Y + 1
X + 1 = Y - 1
X = 5, Y = 7
In this book, we can set up the following equations
2（X-1)=Y+1
X+1=Y-1
The solution is: x = 5
Y=7
A: there are five for a and seven for B.
We know that the singular function f (x) is monotonically decreasing in the domain of definition [- 3.3], and solve the inequality f (x ^ 2-2x) + F (X-2))
We know that the singular function f (x) decreases monotonically in the domain of definition [- 3.3], and solve the inequality f (x ^ 2-2x) + F (X-2)
From the known f (x ^ 2-2x) + F (X-2)
Let u = {(x, y) | y = 3x-1}, a = {(x, y) | y − 2x − 1 = 3}, then ∁ UA=______ .
∵ set u = {(x, y) | y = 3x-1}, a = {(x, y) | y − 2x − 1 = 3} = {(x, y) | y = 3x-1, and X ≠ 1}, ∁ UA = {(1, 2)}, so the answer is {(1, 2)}
Which formulas of the formula method for solving binary linear equation?
 
If the singular function f (x) decreases monotonically in the domain (- 4,4), the inequality f (4-2x) + F (x ^ 2-4) about X is solved
-4
If the set u = {(x, y) | x, y belongs to R}, a = {(x, y) | y = 3x-2}, B = {(x, y) | (y-4) \ (X-2) = 3}, then anb =? (CUA) UB =?
Anb is actually to find the coordinates of the intersection of the two lines, CUA is actually an empty set, and the union of the empty set and B is B
What is the meaning of element and degree in 2-element quadratic equation? How to solve this equation?
Binary means that there are two variables in the middle of the equation. For example, x, y, quadratic means that the power of the highest term in the equation is two. For example, x ^ 2, y ^ 2 or XY. The central idea of this equation is to eliminate the unknown, that is, to replace another unknown with an unknown. Generally, this kind of equation appears in the form of equations
Given that the function y = f (x) is an even function defined on R, when x < 0, f (x) is monotonically increasing, then the solution set of the inequality f (x + 1) > F (1-2x) is______ .
Because the function y = f (x) is defined on R, the inequality f (x + 1) > F (1-2x) is equivalent to f (| x + 1 |) > F (| 1-2x |), because when x ＜ 0, f (x) is monotonically increasing, so when x ＞ 0, the function f (x) monotonically decreasing. So | x + 1 | 1-2x |, the square of the inequality f (x + 1) > F (1-2x |, we get x2-2x ＞ 0, that is x ＞ 2 or X ＜ 0. So the solution set of the inequality f (x + 1) > F (1-2x) is (- ∞, 0 ）So the answer is: (- ∞, 0) ∪ (2, + ∞)
One in three plus 2x is five minus two plus 3x plus two
1 / 3 + 2x = X-2 / 5 + 3x + 2
Multiply left and right 15 5 + 30x = 3x-6 + 45x + 30
18x=-19
x=-19/18