K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

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..........................................................................................................................................................................................................................................................................................................................................................................................................................................................2k8 :3

bạn có thể vô tìm ở đây

I

I

V

https://olm.vn/hoi-dap#collapseOne

26 tháng 8 2019

2k4 đến 2k mấy

23 tháng 8 2019

bạn cứ đăng thử ik ạ nếu bít thì sẽ có ng làm mà

23 tháng 8 2019

mình đăng r..mà ko có ai hết a

Trong một lớp học ngoại ngữ, tập hợp A các học viên nữ có 4 phần tử, tập hợp B các học viên từ 20 tuổi trở lên có 5 phần tử. Có 3 học viên nữ từ 20 tuổi trở lên. Tìm số phần tử của tập hợp A ∪ B.Trên một bãi để xe, có 42 xe gồm taxi và xe buýt. Có 14 xe màu vàng và 37 xe buýt hoặc xe không có màu vàng. Hỏi trên bãi để xe có bao nhiêu xe buýt vàng? Một lớp học có 40 học sinh, trong...
Đọc tiếp

Trong một lớp học ngoại ngữ, tập hợp A các học viên nữ có 4 phần tử, tập hợp B các học viên từ 20 tuổi trở lên có 5 phần tử. Có 3 học viên nữ từ 20 tuổi trở lên. Tìm số phần tử của tập hợp A ∪ B.

Trên một bãi để xe, có 42 xe gồm taxi và xe buýt. Có 14 xe màu vàng và 37 xe buýt hoặc xe không có màu vàng. Hỏi trên bãi để xe có bao nhiêu xe buýt vàng? 

Một lớp học có 40 học sinh, trong đó có 15 em học khá môn Toán, 16 em học khá môn Văn và 17 em học khá môn Tiếng Anh. Có 5 em học khá cả hai môn Văn và Toán, 8 em học khá cả hai môn Toán và Anh, 6 em học khá cả hai môn Văn và Anh, và 2 em học khá cả ba môn. Hỏi có bao nhiêu học sinh

a. Chỉ học khá môn Toán

b. Chỉ học khá môn Văn?

c. Chỉ học khá môn Anh?

d. Không học khá môn nào?

0
14 tháng 8 2017

ko cần kết bạn vẫn có thể giúp bạn giải toán mà :)

14 tháng 3 2020

ai giải giùm mik vài bài toán đi.thanks

31 tháng 3 2021

có đề thi HS giỏi lớp 5 ko ạ

7 tháng 1 2022

ko trung bình

 

18 tháng 2 2022

vậy à

 

29 tháng 10 2023

ĐKXĐ: x+7>=0

=>x>=-7

\(x^2+\sqrt{x+7}=7\)

=>\(x^2-4-3+\sqrt{x+7}=0\)

=>\(\left(x-2\right)\left(x+2\right)+\sqrt{x+7}-3=0\)

=>\(\left(x-2\right)\left(x+2\right)+\dfrac{x+7-9}{\sqrt{x+7}+3}=0\)

=>\(\left(x-2\right)\left(x+2+\dfrac{1}{\sqrt{x+7}+3}\right)=0\)

=>x-2=0

=>x=2(nhận)