![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
Please fill in the number represented by X to make the equation true (1） X÷X=X2 X=（ ） （2）X+X=2X X=( ) (3) X2=2X X=( ) (4) X2=X-X X=( ) Which prawn can help me to solve it!
(1) X △ x = x2 x 2 x = (± 1) (2) x + x = 2x x = (any real number)
(3) X2 = 2x x = (0 or 2) (4) x2 = x-x x = (0)
A mathematical problem. Observe the following equation. It is a symbol of operation =1 =1x2 =1x2x3 Computing 2012! 2011
2012!/2011!=2012
Sixth grade math problem, master into Observe the first line of the equation, according to the law to complete the following equation Example: 5 / 2 + 5 / 3 = 5 / 2 * 5 / 3 (1) . 7 / 3 + () = 7 / 3 * () (2) . () + 8 / 5 = () * 8 / 5 (3) . () * 10 / 3 = () + 10 / 3 (4) . twelve fifths * () = twelve fifths + () （5）5*（）=5+（）
Yes, I will
1.4/17
2.3/8
3.7/10
4.7/12
5.4/5
I'm in the sixth grade, too
Observe the following set of equations: The square of 3 + the square of 4 = the square of 5 The square of 5 + the square of 12 = the square of 13 The square of 7 + the square of 24 = the square of 25 9 squared + 40 squared = 41 squared According to your analysis, what law can you find out from it? Please use an equation containing n (n is greater than or equal to 1 and is a positive integer) Please express the relationship
Let 2n + 1 be the odd number, let (2n + 1) 2 = y 2 - x 2 = (x + y) (Y-X). Because X and y are continuous positive integers, Y-X = 1, x + y = 4N + 4N + 1, and y = 2n + 2n + 1
Please use the following ten numbers: 1, 2, 3, 4, 5, 6, 7, 8, 9 to make up the equation. Each number can only use one （）（）+（）－（）＝（）（）*（）＝（）（） Use 1,2,3,4,5,6,7,8,9 to fill in a number in each bracket to make the formula true (each number can not be reused) （）（）+（）－（）＝（）（）*（）＝（）（） One of them () is to fill in a number, which means one digit, and () means that the filled number is a two digit number You cannot use 0 in the title
69 + 3 - 2 = 14 * 5 = 70
50 + 7 - 9 = 16 * 3 = 48
Can't there be a zero?
Add "+" and "-" in the following formula to make the equation true 9 8 7 6 5 4 3 2 1=21．
9+8+7-6+5+4-3-2-1，
=24-6+9-6，
=18+9-6，
=21；
So the answer is: +, +, -, +, -, -, -
Put 0, 1, 2, 3, 7, 8, 9 in the space below to make the equation true （ ）+（ ）=（ ）（ ）-（ ）=（ ）（ ）
8+9=20-3=17
Fill in the following equation with 8 numbers: 1, 2, 3, 4, 5, 6, 7, 8+____ +____ =9+____ +___ =8+___ +___ =6+____ +____
1 + 6 + 8 = 9 + 1 + 5 = 8 + 3 + 4 = 6 + 2 + 7 = the same!: - D I thought for a moment. The important thing is to figure out the average of the four numbers in 1986. The equation containing these four numbers should hold, so that we can do this
Match stick math problem 1 + 9 = 8 + 8 move two matchsticks to make the equation true
11+6=9+8
Move a match from 9 to 6
Move the match of the first 8 into 9 and put it in front of 1 to make 11
Moving matchstick math problem 4 = 14 + 1-1 + 1
114 + 1 - 111 = 4 remove the horizontal of the second + sign and put it in front of it. When 1 is OK, the following 1 + 1 becomes 111
RELATED INFORMATIONS
- 1. 11 + 1 + 1 - 111 = 4 move a matchstick to make the equation hold!
- 2. It is proved by mathematical induction that the nth power of 2 > 2n + 1 (n ∈ n *, n ≥ 3)
- 3. Mathematical induction to prove inequality (1 / N + 1) + (1 / N + 2) +. + (1 / 3N + 1) > 25 / 24
- 4. Given that a, B and C are the three sides of the triangle ABC, and a square C square - b square C square = a 4 power - B power, try to judge the shape of the triangle ABC
- 5. Given that a, B, C are the three sides of the triangle ABC and satisfy the relation a ^ 2 + C ^ 2 = 2Ab + 2bc-2b ^ 2, try to judge the shape of the triangle ABC and explain your reasons
- 6. It is known that a, B and C are the three sides of a triangle, a = 2n 2 + 2n, B = 2n + 1, C = 2n 2 + 2n + 1 (n is a natural number greater than 1), we try to explain that △ ABC is a right triangle
- 7. If a, B, C are the three sides of △ ABC, and A2 + B2 + C2 = AB + AC + BC, then △ ABC is () A. Isosceles triangle B. Right triangle C. Equilateral triangle D. Isosceles right triangle
- 8. If the length of the three sides of the triangle ABC is a, B, C, and satisfies the condition that the square of a + the square of B + the square of C = AB + BC + Ca, what kind of triangle is this triangle To solve problems,
- 9. It is known that the three sides of the triangle ABC are a, B, C, and satisfy the relation a square + b square + C square + 50 = 6A + 8b + 10C,
- 10. If the lengths of the three sides of △ ABC are a, B and C respectively, and the equation a 2 + B 2 + C 2 = AB + AC + BC is satisfied, try to determine the shape of the triangle
- 11. Mathematical formula and definition of grade one to grade six in primary school (PEP)
- 12. How to express the present value, final value coefficient, (formula), (what do P / A, P / F mean), calculation formula, how to calculate
- 13. Both a and B are orthogonal matrices. The determinant of a + B = 0. It is proved that the determinant of (a + b) is equal to 0
- 14. Inverse trigonometric function table Inverse trigonometric function table It's the sine, cosine, tangent value corresponding to each angle value It's better to show how to find inverse trigonometric functions by hand
- 15. Ask a question, very urgent Oh/ If the function y = (m-2) x ^ (m ^ 2-m-3) is an inverse proportional function of X 1. Find the value of M 2. Write the analytic trial and the proportional coefficient of the function
- 16. A three digit number is equal to 19 times the sum of its digits. What is the sum of the largest and the smallest of the three digits?
- 17. For 3 - 1 - 4 three numbers, the following operations are carried out: take two arbitrary numbers, divide their sum by root 2, their difference is also divided by root 2, add a number that was not taken before, and then generate three numbers. Can the sum of squares of three numbers be equal to 2008 after repeating the above operation several times?
- 18. Calculus inverse function Y = 2 sin (3x) times to find the inverse function, I can not find X I can only work out sin (3x) = LN2 divided by LNY, and then I won't. and how to do this kind of problem is equivalent to y = 1 + ln (x + 2)
- 19. What is the inverse function to the power of X + 1 of function y = 2? Well, I got it down to log2 (y) = x + 1, x=log2（y）—1=log2（y）—log2（2）=log2（y/2） That's all I can do
- 20. High inverse function, There is no inverse function for the power function y = x ^ 2. Why? Detailed explanation, thank you If the power function y = x ^ a (a > 0) has an inverse function, then a can take____ If the power function y = x ^ a (a)