The number of 45 ones and 45 thousandths is ()
Well, I'm sorry to answer
In fact, this is the most basic. You really have to do it yourself
I have a math problem, I don't know whether it's right or wrong
PI is the ratio of circumference to straight meridian (). Should this question be checked or crossed?
I think it should be wrong. In my opinion, the last word of "Pi" should be changed to "ratio". Is my idea right? Should this question be checked or crossed?
I don't think it's right. It doesn't say "in the same circle". Only the circumference of the same circle is π times the diameter!
I'm in sixth grade
How to arrange 1, 1, 2, 2, 3, 3, 4, 4 so that there is one other number between two 1s; two other numbers between two 2S; three other numbers between two 3S; for example, 312132, 231213; whether there are four other numbers between two 4S? At least two sets of answers are required
23421314
forty-one million three hundred and twelve thousand four hundred and thirty-two
A and B walk in the opposite direction at the same time from two places 200 meters apart. A travels 65 meters per minute and B 70 meters per minute. After 8 minutes, how many meters is the distance between them?
(65 + 70) * 8 + 200 = 1280 or (65 + 70) * 8-200 = 880
Mathematics one variable quadratic equation
For the sake of urban appearance and greening environment, after two years, the green area of a city has increased by 44%. How about the average annual growth rate of green area in these two years?
Setting: the average annual growth rate of green space area in the past two years is X
Then: (1 + x) 178; = 1.44
∴1+x=±1.2
∴x1=0.2=20%
X2 = - 2.2
The average annual growth rate of green space area in the past two years: 20%
220(1+x)(1+x)=242
(1+x)(1+x)=242/220
(1+x)²=242/220
1+x=√242/220
X = ± √ 1.1 (1.1 is 11 / 10, understand) - 1
x=[ ±√(11×10)/(10×10) ]-1
x=±1/10√110-1
X1=1/10√110-1
X2 = - 1 / 10 √ 110-1 is detailed enough
Ninth grade mathematics, with a quadratic equation solution
It is necessary to use 20 meters long iron railings, one side against the wall, to form a rectangular flower garden. How to make the largest area of the flower garden? It is best to give a method. If you can answer it, I will be very grateful
Let the length of the side against the wall be x, then the width is (20-x) / 2
So the area is s = x (20-x) /. 2 = - 1 / 2 (X-10) & 178; + 50
So when x = 10
The maximum area is 50 square meters
So it's 10 meters long and 5 meters wide
64+( )=64-( )
0,64-0 = 64 + 0
How much is 150 minus 99
150-99 = 150-100 + 1 = 51, so 150 minus 51 equals 99
How much is infinity minus infinity? Why?
How much is infinity plus infinity? Why? Then how about subtraction, multiplication, division, power and square root? Why?
I can understand the situation except subtraction. I think the answer is infinite. Why
I'm a freshman in high school, but I've learned the derivative part. I hope I don't talk too much about it!
If you have learned derivative by yourself, then you should have a certain understanding of limit theory (taking the theory of ε - n as an example). The operation of infinity (that is, the so-called "infinity" in the textbook) depends on the specific way of function / sequence divergence, which cannot be generalized