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The product of the numerator and denominator of a minimalist fraction is 56. The minimalist fraction is 56______ ．
Because 56 = 1 × 56 = 2 × 28 = 4 × 14 = 7 × 8, among these factors, 1 and 56 are coprime, 7 and 8 are coprime, so the product of this molecular denominator is the simplest true fraction of 56, which is 156 or 78
Xiaogang and Xiaoqiang collected a total of 128 stamps. Xiaoqiang collected 5 more than twice as many as Xiaogang. How many stamps did Xiaogang and Xiaoqiang collect
Each collection
If Xiaogang has x, Xiaoqiang has 128-x,
128-x = 2x + 5
Calculate x = 41
128-41=87
A: Xiaogang has 41 stamps and Xiaoqiang has 87 stamps
Exercises on history and society in the second semester of junior one
Recently, a new face has appeared in the fruit market. This kind of fruit tastes unique, sweet and delicious, but the price is also higher. Fewer people buy it. People just want to taste it. Therefore, do you think the most important factor influencing people to buy this kind of product is ()
A. Price B. advertising influences C. shoppers' needs and preferences D. fruit quality
Please give the reason to the person who answers the question.
Otherwise, it will not be adopted, and it must be avoided!
The topic says that the price is also higher, so people consider the price problem, fewer people buy, people just go to taste fresh, do not intend to buy, because the price is too high
So choose a
B. the influence of the advertisement does not meet the requirements and there is no mention of the advertisement
C. the needs and preferences of shoppers are not right. New faces, this kind of fruit is sweet and delicious, and the price is high, even if few people buy it
D fruit quality is very good, this fruit taste unique, sweet and delicious, you can see
Never said that the quality of the fruit is poor. So it's not right
Only a matches
A point whose coordinate is an integer on the number axis is called integral point. The unit length of a certain number axis is 1cm. If a line segment AB with length of 2009cm is drawn on the number axis, the number of integral points covered by line segment AB is ()
A. 2008 or 2009b. 2008 or 2010c. 2009 or 2010d. 2010 or 2011
If point a is not on the whole point, then point B cannot fall on the whole point. There are 2009 integer points on line ab. if point a is on the whole point, then point B is on the whole point. There are 2010 integer points on line AB, so select C
What can be used to directly measure the ground intersection distance
The distance between the two points on the ground can be measured directly by () or (). When measuring a long distance, the distance between the two points should be measured by (), and then along (). When there is no measuring tool or the measurement result is not very accurate, it can also be measured by () or ()
Steel ruler, tape measure, straight line, this straight line, step estimation, visual estimation
If 3x ^ n + 1y ^ B is the same as - 1 / 2x ^ 3-NY ^ 2a, then a =, B=
If there is a problem with the title, we can only draw the conclusion that 2A = B, and then look carefully to see if the title is wrong
3.6 cubic meters = () cubic decimeters () cubic centimeters 5.16 cubic decimeters = () cubic decimeters () cubic centimeters
3600 3600000 5 160
A passenger car and a freight car run from both sides of a and B at the same time. When they meet, the passenger car runs 70 kilometers more than the freight car. It is known that the speed ratio of the passenger car and the freight car is 7:5, and the distance between a and B is 70 kilometers______ Kilometers
7 + 5 = 1270 ^ (712-512), = 70 ^ 16, = 420 (km); answer: the distance between a and B is 420 km
Comparison size: positive number a less than 1, square of a, cube of A
Er. I don't understand
Positive number a less than 1
00
So a > A ^ 2
a^2-a^3=a^2(1-a)
a^2>0,1-a>0
So a ^ 2 (1-A) > 0
So a ^ 2 > A ^ 3
So a > A ^ 2 > A ^ 3
(x+1)(x+2)(x+3)(x+4)-(x^2+5x+3)(x^2+5x+7)=?
=[(x+1)(x+4)][(x+2)(x+3)]-[(x^2+5x)+3][(x^2+5x)+7]
=[(x^2+5x)+4][(x^2+5x)+6]-[(x^2+5x)+3][(x^2+5x)+7]
=[(x^2+5x)^2+10(x^2+5x)+24]-[(x^2+5x)^2+10(x^2+5x)+21]
=(x^2+5x)^2+10(x^2+5x)+24-(x^2+5x)^2-10(x^2+5x)-21
=3
RELATED INFORMATIONS
- 1. The product of the numerator and denominator of a minimalist fraction is 56. The minimalist fraction is 56______ ．
- 2. For a true fraction, the least common multiple of the numerator and denominator is 56. The numerator and denominator are coprime numbers. If the numerator plus 1, the fractional value is equal to 1 How many?
- 3. According to the meteorological observation data of a certain place, the temperature will decrease by about 6 degrees for every 1km increase in altitude. If the surface temperature of the area is 21 degrees, the temperature of a place in the upper air is - 39 degrees Find the height above the ground
- 4. 6. The least common multiple of 12, 20, 30, 42, 56
- 5. Choose two logarithms from 2, 3, 4, 6, 8, 10 and 12, and make their ratio equal to 2 1. Select two logarithms from 2, 3, 4, 6, 8, 10 and 12, make their ratio equal to 2 and form a proportion, and then select two logarithms whose ratio is 3 and form a proportion 2. Can you make a ratio of four sums within 20, all of which are two-thirds?
- 6. Let a and B be the two real roots of the equation x Λ 2 + x-2011 = 0, then the value of a Λ 2-B is?
- 7. Given that the equation x ^ 2 + (A-3) x + 3 = 0 has a solution in the range of real number, and exactly one solution is greater than 1 and less than 2, what is the value range of a
- 8. If both equations x2-11x + 30 + a = 0 are greater than 5, then the value range of real number a is______ ．
- 9. Given the | y | of 3 times root x + 5 times, we can find the value range of M = 2 times root x-3 | y | I can't play root. How can I play root
- 10. The absolute value of equation (x minus 2) = the number of real roots of lgx is
- 11. (1) [(35 / 6-49 / 12 + 63 / 20-77 / 30-105 / 56) / 1 / 8 is the best,
- 12. -1,2, - 4,8, - 16,32
- 13. There is a column of numbers arranged in a certain order: 2, - 4, 8, - 16, 32, - 64 According to this rule, write the number of the nth term______ (★ friendly tips: it can be expressed in the form of power, to be tested)
- 14. 1. 2, 4, 8, 16, 32, 64, 128... Who knows the formula
- 15. In Hangzhou middle school basketball match, Xiao Fang played 10 games. He scored 22, 15, 12 and 19 points in the 6th, 7th, 8th and 9th Games respectively. His average score y in the first nine games is higher than that in the first five games. If his average score in the 10th game is more than 18 points. (1) express y with algebraic formula containing x; (2) Xiao Fang's total score in the first five games What is the maximum value that can be achieved; (3) what is the minimum value that Xiao Fang can achieve in game 10?
- 16. On the simple inequality of one variable, a difficult problem, 1. Inequality system x-a>2 The solution set of b-2x > 0 is X
- 17. Uncle Li bought the same number of a and B rabbits a year ago. At present, the number of these two kinds of rabbits he raised is still the same, and the number of a kind of rabbits has increased by 20, while that of B kind of rabbits has decreased by 10. (1) how many kinds of rabbits did Uncle Li buy a year ago? (2) At present, Mr. Li is ready to sell 30 breeding rabbits. It is known that he can make a profit of 15 yuan per rabbit of type A and 6 yuan per rabbit of type B. if he wants to sell less rabbits of type A than rabbits of type B, and the total profit is not less than 280 yuan, what kinds of rabbit selling plans does he have? Which scheme is the most profitable? Ask for the maximum profit
- 18. On the linear inequality of one variable If the inequality (3a-2) x + 42, then a must satisfy_____________ (please write the process) Inequality-3 (x + 2)
- 19. Is there an integer a, so that the solution of the inequality ax-a > 2x + 2 is x > - 3? If so, find out the value of A. if not, explain the reason
- 20. Find 847 to the 29th power of the number of digits