5445 x 0
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a/ 36 460 + 22 478 = 58 938
b/ 5486 - 3450 = 20 36
c/ 5445 : 9 = 65
d/ 3254 x 4 = 13 016
b: Đặt \(\sqrt{x+1}=a;\sqrt{4-x}=b\)
=>\(a+b+ab=5\)
\(\Leftrightarrow\sqrt{a^2+b^2-2ab}=5-ab\)
=>\(a^2+b^2-2ab=\left(5-ab\right)^2\)
=>\(x+1+4-x-2\sqrt{\left(x+1\right)\left(4-x\right)}=\left(5-\sqrt{\left(x+1\right)\left(4-x\right)}\right)^2\)
\(\Leftrightarrow5-2ab=\left(5-ab\right)^2\)
=>5-2ab=25-10ab+a^2b^2
=>a^2b^2-10ab+25-5+2ab=0
=>a^2b^2-8ab+20=0
=>\(\Leftrightarrow\left(a,b\right)\in\varnothing\)
a: \(\Leftrightarrow\left\{{}\begin{matrix}\sqrt{x+1}-3\sqrt{y-1}=-1\\2\sqrt{x+1}+5\sqrt{y-1}=9\end{matrix}\right.\)
=>\(\Leftrightarrow\left\{{}\begin{matrix}2\sqrt{x+1}-6\sqrt{y-1}=-2\\2\sqrt{x+1}+5\sqrt{y-1}=18\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}-11\sqrt{y-1}=-20\\\sqrt{x-1}-3\sqrt{y-1}=-1\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}y-1=\dfrac{400}{121}\\x-1=\dfrac{2401}{121}\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=\dfrac{2522}{121}\\y=\dfrac{521}{121}\end{matrix}\right.\)
1+1= 2
3+95425=95428
95482655644+8245445=9,549090109^10
656+414=1070
542+45472=46014
686+5445=6131
1+1=2
3+95425=95428
656+414=1070
542+45472=46014
686+5445=6131
a) \(0\times3=0\)
\(0\times4=0\)
\(0\times5=0\)
b) \(0\times6=0\)
\(0\times7=0\)
\(0\times9=0\)
\(0:6=0\)
\(0:7=0\)
\(0:8=0\)
\(0:9=0\)
5445x0=0
duyệt đi
0
ủng hộ nha