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What is the number of the simplest of the following fractions (1) Square of X + 2x + 1 / x + 1 (2) Square of a + square of B / a-b (3) Square of X - square of Y / x + y (4)5ax/3ay The simplest common denominator of 2-fraction 2C / 3A square b square, 3A / - 4B fourth power C, 5b / 2A square C is A 12a square B fourth power C square B 24a square B fourth power C square C 24a fourth power B sixth power C square D 12a square B fourth power C square Three points a (x1, Y1) B (X2, Y2) C (X3, Y3) are all on y = 2 / x, x1
First question: 1. The numerator of non minimalist fraction is the square of (x + 1) 2. The minimalist fraction 3. The numerator of non minimalist fraction = (x + y) (X-Y) 4. The number of non minimalist fractions with common factor A is one. Second question: denominator: 3A ^ 2B ^ 2 - 4B ^ 4C 2A ^ 2C the minimum of denominator
What is the number of the simplest of the following fractions
Only (2)
The simplest common denominator of 2-fraction 2C / 3A squared B squared, 3A / - 4B quartic C, 5b / 2A squared C should be 12a squared B quartic C
Points a (x1, Y1) B (X2, Y2) C (X3, Y3) are all on y = 2 / x, x1
Of all the four digits, how many are 34?
Suppose there are 4 boxes, each box contains 9 balls, representing 4 digits 9999, and 36
Then take off 2 balls, and the rest is 34. But take the ball in no order
Then it can be 889989989988989999997997997997999
The method is baffle method, three baffles separate the two balls, C52 = 10
10.
Xiaoming and Xiaojun have 20 storybooks in total. Xiaoming has 4 more than Xiaojun. How many storybooks does Xiaoming have? Xiaojun?
I haven't learned division in the first grade. It's a bit of a pain. I can only use addition and subtraction to solve it
First grade is not division. So this topic must draw line to understand
------------Xiao Ming
------------1 --- Xiaojun
They have 20 copies in total, so it can be assumed that one person and half, that is, one person and ten copies
Divide the extra four books into two, that is, two. Take out two of Xiaojun's books to Xiaoming, and Xiaoming will have four more than Xiaojun
The ratio of a and B is 3:5
What fraction of a is B?
B is the percentage of a (one decimal place before the percent sign)
A is 3 / 5 of B and B is 166.7% of A
A is 3 / 5 of B, and a is 2 / 5 less than B; B is more (5-3) / 3 than a, that is, B is 66.7% more than a and B is 166.7% of A
A is 3 / 5 of B and B is 166.7% of A
What's the smallest four digit number on your list where the sum of the numbers equals 34
seven thousand nine hundred and ninety-nine
The smallest four digit number on your list where the sum of the numbers equals 34 is 7999
seven thousand nine hundred and ninety-nine
7999
Xiaoming finished a story book in 10 days, but Xiaojun finished it two days earlier than Xiaoming. Xiaoming read three pages less than Xiaojun every day. How many pages is this book?
Xiaoming finished it in 10 days, Xiaojun finished it two days earlier than Xiaoming
That is, Xiaojun watched it in 8 days
Xiao Ming reads three pages less than Xiao Jun every day
In 8 days, Xiao Ming read 24 pages less than Xiao Jun
At this time, I have read Xiaoming for 24 days
So this book has 12 * 10 = 120 pages
Formula calculation:
（10-2）*3=24
24/2*10=120
Xiaoming's speed is 1 / 10, Xiaojun's speed is 1 / (10-2) = 1 / 8
3 / (1 / 8-1 / 10) = 3 * 40 = 120 pages
3/（1/8-1/10)=120
The book has 120 pages
Help me solve some math problems!
1. X + 1 / x = 2 find X-1 / X
2. Let x-3y + 2Z = 0 and prove that x ^ 2-9y ^ 2 + 4Z ^ 2 + 4XZ = 2001 is the fixed value
OK, I'll add points (⊙ o ⊙) oh A kind of (^ω^) A kind of It's due tomorrow·
The first question is equal to 0, x + 1 / x = 2, both sides are multiplied by X to get x ^ 2 + 1 = 2x, so it's easy to solve x = 1, so X-1 / x = 0. If the second question is related to the first question and the second question, if not, then when x, y, Z are equal to 1, x-3y + 2Z = 0 holds, but when x ^ 2-9y ^ 2 + 4Z ^ 2 + 4XZ = 2001 does not hold
1. (x + 1 / x) square = 4 = x square + 2 + 1 / x square, that is, x square + 1 / x square = 2, (x-1 / x) square = x square - 2 + 1 / x square, because x square + 1 / x square = 2, so (X-1 / x) square = 2-2 = 0, so X-1 / x = 0
There are some four digits. The sum of four digits is 34. How many such four digits are there?
There are 10
7999,
8899,8989,8998,
9799,9979,9997,
9889,9898,9988,
Xiaojun and Xiaoming each have several storybooks. If Xiaojun gives Xiaoming five, they have the same number of storybooks. If Xiaoming gives Xiaojun four, Xiaojun has the right number of storybooks
It's three times that of Xiaoming. How many copies did Xiaojun and Xiaoming have?
Suppose Xiaoming had x books and Xiaojun had (x + 5 × 2) books
3（x-4）=x+10+4
3x-12 = x+14
2x =26
x =13
Xiaojun has 13 + 10 = 23 (Ben)
Are you in primary school? Did you learn the equation? I didn't understand. Let the teacher talk to you
As shown in the figure, in the Pentagon ABCDE, ∠ B = ∠ e, ∠ C = ∠ D, BC = De, M is the midpoint of CD, verification: am ⊥ CD
It is proved that: extend the extension line of AB AC DC to g, extend the extension line of AE AC CD to h, ∵ - ABC = ∠ AED, ∵ ABC + ∠ GBC = 180 °, ∵ AED + ∠ DEH = 180 °, ≌ GBC = ∠ DEH, similarly,
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