A very interesting playground

A very interesting playground

a very interesting amusement park
English translation
Such as the title
My mother loves me very much
My mother loves me very much
My mom loves me very much.
My mother loves me deeply.
My mom loves me very much.
My mother loves me so much。
I have a father and mother who love me?
I have a mom and dad who love me
Let the sum of the first n terms of the arithmetic sequence {an} be Sn, if A1 = - 11, A4 + A6 = - 6, then when Sn takes the minimum value, n is equal to ()
A. 6B. 7C. 8D. 9
Let the tolerance of the sequence be D, then A4 + A6 = 2A1 + 8D = 2 × (- 11) + 8D = - 6, the solution is d = 2, so Sn = − 11n + n (n − 1) 2 × 2 = N2 − 12n = (n − 6) 2 − 36, so when n = 6, Sn takes the minimum value. Therefore, select a
What is the letter symbol of electric energy?
Electric energy is represented by the letter W
Electric energy formula: w = uit = Pt
The unit of electric energy is "degree", its scientific name is "kilowatt hour" (kW · h)
In physics, the more commonly used energy unit (i.e. main unit, sometimes called international unit) is Joule, abbreviated as Joule, and the symbol is J. their relationship is: 1kW · H = 3.6 × 10 ^ 6J
W
The letter symbol of electric energy is w
The fourth floor is comprehensive.
The problem of four mixed operations of fraction
Is there a formula with four numbers on one side, such as 4 × 5-10 plus 3
no, it isn't.
Four operations refer to the operations in which the first level operation (addition and subtraction) and the second level operation (multiplication and division) appear in one formula at the same time
Four refer to the calculation rules of addition, subtraction, multiplication and division
A formula of four arithmetic operations does not need to have four kinds of operation symbols. Generally speaking, it refers to the operation of combining the majority into one number by two or more operation symbols and brackets. In the mixed operation, the brackets are calculated first, from small to large, and then from high to low
sin²30°+cos²30°+√8tan45°－6sin45°＋﹙-1﹚²º¹²
sin²30°+cos²30°+√8tan45°－6sin45°＋﹙-1﹚²º¹²=（sin²30°+cos²30°）+√8tan45°－6sin45°＋﹙-1﹚²º¹²=1+2√2*1-6*√2/2+1=1+2√2-3√2+1=2...
2-radical 2
The building at the front is unraveling!
Because sin ^ 2 x + cos ^ 2x = 1
tan 45=1
Sin45 = root 2 / 2
(- 1) ^ even times = 1
therefore
simple form
=(Sin & # 178; 30 ° + cos & # 178; 30 °) + √ 8 * 1-6 * radical 2 / 2 + 1
=1 + 2 radical 2-3 radical 2 + 1
=2-radical 2
What does the GWE symbol mean in terms of electricity?
Some suggestions are provided for reference
Gigawatt Electric(GWe)
The Graduation Witting Exam (GWE)
Great Western Electronics
Four mixed operation exercises on fractions (1)
1. Calculate the following questions. If you can easily calculate, use a simple method
7 / 9 / 5 / 11 + 2 / 9 × 5 / 11 / 88 × (7 / 11-3 / 8)
99 × 100:99 13:12 × 7:3 + 7:4 × 13:12-13:12
1 / 3 + 1 / 6
6 out of 7 × (4 out of 5-2 out of 3) × 1 out of 5, 3 out of 4-4 out of 4 × 4 out of 7 + 3 out of 7
2. Solve the equation
X-7 / 4x = 3 / 10
3. The first day of road construction is 120 meters, and the second day is 3 / 4 of the first day. How many meters less than the first day?
4. Aunt Liu grows vegetables in a vegetable field with an area of 4 / 5 hectare, of which 1 / 2 is cucumber, 1 / 5 is tomato, and the rest is pepper. What is the area of pepper?
1. Calculate the following questions, can be easily calculated with a simple method
7 / 9 △ 11 / 5 + 2 / 9 × 5 / 11
=7 / 9 × 5 / 11 + 2 / 9 × 5 / 11
=(7 / 9 + 2 / 9) × 5 / 11
=1 × 5 / 11
=5 out of 11
88 × (7 / 11-3 / 8)
=7 / 88 × 11-3 / 88 × 8
=56-33
=23
99 × 99 / 100
=99 × (1-1 / 100)
=99 × 1-99 × 1 / 100
=99-99 / 100
=98 1 / 100
12 of 13 × 3 of 7 + 4 of 7 × 12 of 13-12 of 13
=12 of 13 × (3 of 7 + 4-1 of 7)
=12 / 13 × 0
=0
6 / 2-13 / 26
=2-4 / 3
=2 / 3
(1 / 3 + 1 / 4) × 36
=1 / 3 × 36 + 1 / 4 × 36
=12+9
=21
6 / 7 × (4 / 5-2 / 3) × 1 / 5
=6 out of 7 × (4 out of 5 × 5-2 out of 3 × 5)
=6 out of 7 × (10 out of 4-3)
=6 / 7 × 2 / 3
=4 out of 7
3 / 4 + 7 / 3
=3 / 4-3 / 7 + 3 / 7
=3 / 4
2. Solve the equation
X-7 / 4x = 3 / 10
3 / 7 · x = 3 / 10
X = 3 / 10 △ 3 / 7
X = 7 / 10
3. The first day of road construction is 120 meters, and the second day is 3 / 4 of the first day. How many meters less than the first day?
Road construction the next day: 120 × 3 / 4 = 90 (m)
So the second day is less than the first day: 120-90 = 30 (m)
Or: 120 × (3 / 1-4) = 30 (m)
4. Aunt Liu grows vegetables in a vegetable field with an area of 4 / 5 hectare, of which 1 / 2 is cucumber, 1 / 5 is tomato, and the rest is pepper. What is the area of pepper?
4 / 5 × (1-2 / 1-5 / 1) = 4 / 5 × 3 / 10 = 6 / 25 (HA)
Evaluate Sin & # 178; 20 & # 186; + cos & # 178; 50 & # 186; + sin20 & # 186; cos50 & # 186;
cos50° = cos(30°+20°) = cos30°cos20°-sin30°sin20° = (√3/2)cos20°-(1/2)sin20° ；
simple form
= sin²20°+[(√3/2)cos20°-(1/2)sin20°]²+sin20°[(√3/2)cos20°-(1/2)sin20°]
= sin²20°+[(3/4)cos²20°+(1/4)sin²20°-(√3/2)sin20°cos20°]+(√3/2)sin20°cos20°-(1/2)sin²20°
= (1+1/4-1/2)sin²20°+(3/4)cos²20°+(√3/2-√3/2)sin20°cos20°
= (3/4)sin²20°+(3/4)cos²20°+0
= (3/4)(sin²20°+cos²20°)
= 3/4