2020202x505050=? giúp với khó quá
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(A=\sqrt{2-\sqrt{3}}+\sqrt{2+\sqrt{3}}\\ \Rightarrow A^2=2-\sqrt{3}+2\sqrt{2-\sqrt{3}}\sqrt{2+\sqrt{3}}+2+\sqrt{3}\\ \Rightarrow A^2=4+2\sqrt{\left(2-\sqrt{3}\right)\left(2+\sqrt{3}\right)}\\ \Rightarrow A^2=4+2\sqrt{2^2-\sqrt{3^2}}\\ \Rightarrow A^2=4+2\sqrt{1}\\ \Rightarrow A^2=6\\ \Rightarrow A=\pm\sqrt{6}\)
Mà \(A>0\Rightarrow A=\sqrt{6}\)
a: Xét tứ giác AKCI có
AK//CI
AK=CI
Do đó: AKCI là hình bình hành
hơi mờ và còn nhiều ,mik nghĩ bạn nên cắt ra đi
1 not going on holiday with you
2 such easy questions that all the students got them right
3 we had had time, we would have visited the museum
4 to Daisy for breaking her vase
5 studying ENglish 5 years ago
6 are thought to be the most popular dance in Brazil
7 sooner had she received the exam result than she phoned her mom
8 It was the absence of leadership that caused most of the problems on the committee
9 you have any complants about the product, return it to the shop
10 The more fondness for the game increased , the more proficiency he has
11 been a dramatical rise in house prices this year
12 believed to have escaped in a stolen car
13 gone out with him for 2 years
14 he was going to meet his sister in front of the station
đk x khác 1 ; y khác -2
\(\left\{{}\begin{matrix}\dfrac{8}{x-1}+\dfrac{15}{y+2}=1\\\dfrac{1}{x-1}+\dfrac{1}{y+2}=1\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}\dfrac{8}{x-1}+\dfrac{15}{y+2}=1\\\dfrac{8}{x-1}+\dfrac{8}{y+2}=8\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}\dfrac{7}{y+2}=-7\\\dfrac{1}{x-1}+\dfrac{1}{y+2}=1\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}y+2=-1\\\dfrac{1}{x-1}+\dfrac{1}{y+2}=1\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}y=-3\\\dfrac{1}{x-1}=2\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}y=-3\\1=2x-2\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}y=-3\\x=\dfrac{3}{2}\end{matrix}\right.\)
2020202x505050 = 1010101.2 x 101010.5 = 1010101.(2.5) .101010 = 10101010.101010= 101010.100,000099.101010=1010102 . 100,000099
đó là đáp số bn ak, nếu tính số cụ thể ra thì chắc ko tính đk vì nó quá to
2020202 * 505050 = 102030302010
nha bn