\(\dfrac{-5}{1000}=\dfrac{-1}{200}\)

Số học sinh của lớp đó là:

\(11:27,5\%=40\) (học sinh)

A = \(\dfrac{2023}{2022^2+1}\) + \(\dfrac{2023}{2022^2+2}\) + ... + \(\dfrac{2023}{2022^2+3}\)+.... + \(\dfrac{2023}{2022^2+2022}\)

A = 2023.(\(\dfrac{1}{2022^2+1}\) + \(\dfrac{1}{2022^2+2}\) + ... + \(\dfrac{1}{2022^2+2022}\))

\(\dfrac{1}{2022^2+1}\) > \(\dfrac{1}{2022^2+2}\) > .... > \(\dfrac{1}{2022^2+2022}\)

Vì dãy phân số trên có 2022 phân số nên: 

A > 2023.  \(\dfrac{1}{2022^2+2022}\). 2022 

A > 2023. \(\dfrac{2022}{2022^2+2022}\)

A > 2023. \(\dfrac{2022}{2022.\left(2022+1\right)}\)

A > \(\dfrac{2023.2022}{2022.2023}\) = 1

A > 1 (đpcm)

1.

My friend's typical school lunch consists of a combination of rice, meat, and vegetables. It's a balanced meal that covers essential food groups. Now, they're intrigued about your lunch preferences. Do you have a go-to meal for lunch, and what's your take on it? Are you a fan of your lunch choices, or do you wish for something different?

The question extends beyond taste to the realm of health. Are your lunches deemed healthy in your eyes? Perhaps you've made conscious choices to incorporate nutritious elements into your meals. On the other hand, maybe you're contemplating ways to enhance the nutritional value of what you eat.

Rice, being a staple in many cultures, brings a significant source of carbohydrates to the lunch table. It's a versatile grain that complements various dishes. The inclusion of meat provides essential proteins, crucial for muscle development and overall bodily functions. The type of meat matters; whether it's poultry, beef, or other options, each brings its unique set of nutrients.

Vegetables, with their vibrant colors and array of vitamins and minerals, round out the meal. They contribute to the overall health factor, offering fiber, antioxidants, and other essential nutrients. The variety of vegetables allows for a diverse range of flavors and textures, making the meal not only nutritious but also enjoyable.

Now, turning the question back to you, what comprises your typical lunch? Is it a hearty sandwich, a refreshing salad, or perhaps a warm bowl of soup? Exploring your lunchtime choices can provide insights into your culinary preferences and dietary habits. Do you find yourself looking forward to lunch, savoring each bite, or do you view it as a mere fuel stop in your busy day?

Considering the health aspect, do you consciously select foods that align with your nutritional goals? It's a common dilemma in the modern world, where convenience often clashes with health considerations. Some might prioritize quick and easy options, while others invest time and effort in preparing well-balanced meals.

Reflecting on your lunch choices, do you feel they contribute positively to your overall well-being? Are you satisfied with the nutritional content, or do you find room for improvement? Perhaps you've embarked on a journey to make healthier choices, incorporating more fruits, vegetables, or whole grains into your meals.

In the broader context of health, lunch is just one piece of the puzzle. It intertwines with lifestyle choices, physical activity, and overall wellness. How does your lunch fit into your daily routine, and do you notice any effects on your energy levels and productivity?

In conclusion, the seemingly simple question about lunch opens up a rich conversation about personal preferences, health consciousness, and the role of food in our lives. It's an exploration into the choices we make three times a day and their impact on our well-being. So, what's on your plate for lunch, and how does it contribute to your journey towards a healthier and more satisfying life?

2.My friend's lunch routine revolves around a mix of rice, meat, and vegetables at school. Now, they're curious about your lunch habits. What's your usual go-to meal, and how do you feel about it? Are you content with your lunch choices, or do you wish for something different?

The question extends to the realm of health. Do you consider your lunches to be on the healthier side, or are you contemplating ways to enhance their nutritional value? The trio of rice, meat, and vegetables in my friend's lunch provides a well-rounded mix of carbohydrates, proteins, and essential nutrients. Each component plays a vital role in creating a balanced and satisfying meal.

As we discuss lunch, it's an opportunity to delve into personal preferences, culinary habits, and the conscious choices we make regarding our well-being. What's your lunchtime routine like, and how do you perceive its impact on your overall health and satisfaction?

Ta thầy 36 và 48 đều chia hết cho 12 nên ước chung lớn nhất có 3 số đã cho là 12

Các ước của 12 là: 1; 2; 3; 4; 6; 12 

Nên các số thỏa mãn là: 1; 2; 3; 4; 6; 12 

\(A=1+6^2+6^4+...+6^{2022}+6^{2024}\)

\(6^2.A=6^2+6^4+6^6+...+6^{2024}+6^{2026}\)

\(\Rightarrow6^2A-A=6^{2026}-1\)

\(\Rightarrow35A=6^{2026}-1\)

\(\Rightarrow A=\dfrac{6^{2026}-1}{35}\)

Nếu p lẻ \(\Rightarrow9p^3-23\ge9.3^3-23>2\)

\(9p^3\) lẻ và 23 lẻ \(\Rightarrow q=9p^3-23\) là số chẵn lớn hơn 2 \(\Rightarrow\) là hợp số (ktm)

\(\Rightarrow p\) chẵn \(\Rightarrow p=2\)

\(\Rightarrow q=9.2^3-23=49\) không phải số nguyên tố (ktm)

Vậy không tồn tại p, q nguyên tố thỏa mãn yêu cầu

viết nhầm thông cảm

It is mine nhé (ko thêm j cả)
 

2/9 - 7/8 : x = 1

7/8 : x = 2/9 - 1

7/8 : x = -7/9

x = 7/8 : (-7/9)

x = -9/8

100000

Số tiền bạn Bình còn lại so với tổng số tiền Bình có:

1 - 1/13 = 12/13

Số tiền bạn Bình có:

360000 : 12/13 = 390000 (đồng)

Số tiền Bình đã mua món quà:

390000 - 360000 = 30000 (đồng)