Log or ln for logarithmic and semi logarithmic coordinate paper

Log or ln for logarithmic and semi logarithmic coordinate paper

General coordinate paper is semi logarithmic coordinates, that is, only the horizontal axis is logarithmic, and the logarithm is log

What is the logarithm ratio of the negative half of e to ln π, log with 5 as the base 2?

Ln π ＞ 1, log52 ＜ 1, negative half of E ＜ 1, wipe, go to sleep next`~

For example: (LG ^ 2 3) - lg9 + 1 becomes (1-lg3) ^ 2
Why can LG ^ 2 3 = (Lg3) ^ 2

lg ^2 3 = lg3 * lg3 =(lg3)^2
It's because the computer can't express it as it does in writing
So there are all kinds of expressions. Only LG ^ 23 is easier to understand
(lg^2 3)-lg9+1
=(lg^2 3)-lg3^2+1
=(lg^2 3)-2lg3+1
=(lg3-1)^2=(1-lg3)^2

Log2 [- x + root (x ^ 2 + 1)]
=Log2 {[(x ^ 2 + 1) - x ^ 2] / [under x + radical (x ^ 2 + 1)]}
How does this step deform?

It is equivalent to the rationalization of molecules, and the numerator denominator is multiplied by (√ (x ^ 2 + 1) + x) at the same time
You can get [(x ^ 2 + 1) - x ^ 2] / [x + root (x ^ 2 + 1)]

How many different ways can I stand when I take a picture with my father side by side? If I take a picture with my father and mother side by side, how many different ways can I stand? (how to calculate)

The first question: two kinds 1, my father 2, father, me
Second question: 6 kinds 1. My parents
2. My mom and Dad
3. Dad, me, mom
4. Dad, mom, me
5. Mom, Dad, me
6. Mom, me, Dad
There are several different ways for sophomores to solve this kind of problem. It's better to use the enumeration (example) method first, and let the children understand the formula through the examples. For example, the second question is: 2 × 3 = 6 (kinds). In this kind of problem, you should first determine who is the first one, and you can specify it at will, In the formula, 2 means that there are two kinds of standing methods after determining who the first one is (for example, there are two kinds of standing methods after determining who the first one is me, 1, my mom and Dad, 2, my mom and Dad), 3 means that there can be three kinds of first position (dad, mom and I), that is, each of 3 has 2, so it is 2 × 3 = 6 (kinds). I hope it is useful for you, and you can ask me some questions

The numbers represented by two points a and B on the number axis are a and - 6 respectively, then the length of line AB is

The numbers represented by two points a and B on the number axis are a and - 6 respectively, then the length of line AB is | a + 6|
I'm very glad to answer your questions. Skyhunter 002 will answer your questions
If you don't understand this question, you can ask,

As shown in the figure, in order to measure the distance between two points c and D of two buildings on the opposite bank of the river, select points a and B on the side of the river bank, and measure ∠ BAC = 45 °, DAC = 75 °, abd = 30 °, DBC = 45 ° and ab = 3km. A, B, C and D are in the same plane. Try to find the distance between two points c and D

In △ abd, ab = 3km, ∠ BAC = 45 °, ∠ DAC = 75 °, ∠ abd = 30 °,  ADB = 30 °, ｜ ad = 3km; in △ ADC, ∠ ACD = 30 °, ｜ cdsin75 ° = 3sin30 °, ｜ CD = 32 − 62

Merge similar exercises (without brackets)
Again, don't use parentheses, such as 2A + 3ab-4a + 5B

2a-5b+4c-7a+5a+5b-4c
4a+6a+3k-2c+3k+5c-7a
3b-6c+4c-3a+4b
3b+3c-6a+8b-7c-2a
6b-4a+6c+7a-6a+7b-3c-6b
5z+3c+7b-3c-7z-6c+4b
5b+2c-7b+4z-3z-7c
2x-3c-6c-5a+2c-x+4c+6a-x
-2c+3c+7b-2z-5b+2z
2c-4s-6s+6c-2s
5c-6c-7c-8c+2b-6b+9b+7c
-3c+8b-5z+8b-4c
5z-5b+6b-2z-3a+9a-3a
2z+5c-7z+8b-3a
3c-7b+5z-7b+4a-6n+8b-3v+9n-7v
I've got 15 questions for you

4.3 m3 = () cubic decimeter () cubic centimeter?
There is no equal sign after cubic decimeter!

It's 4000 cubic decimeters, 300 cubic centimeters

The distance between a and B is 480 km. The passenger cars and freight cars start from a and B at the same time and run in opposite directions. The passenger cars run 70 km per hour and the freight cars run 70 km per hour
The distance between a and B is 480 km. The passenger cars and freight cars start from a and B at the same time and travel in opposite directions. The passenger cars travel 70 km per hour and the freight cars 50 km per hour. How many kilometers do the two cars travel when they meet

480 / (70 + 50) = 4 hours
70 * 4 = 280 km
50 * 4 = 200 km
A: when we met, the bus traveled 280 kilometers and the truck 200 kilometers