giúp mk phần writing vs
K
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7 tháng 12 2021
1. My father is older than my mother.
2. There is a sink, a fridge, a cooker and a cupboard in our kitchen.
3. There are five rooms in my house.
4. You shouldn't spend a lot of time watching TV.
5. You must do your homework before going to school.
26 tháng 6 2021
1. \(P=\dfrac{\sqrt{x}+4}{\sqrt{x}-1}:\left(\dfrac{3\sqrt{x}+1}{\left(\sqrt{x}-1\right)\left(\sqrt{x}+3\right)}-\dfrac{2}{\sqrt{x}+3}\right)\)
\(P=\dfrac{\sqrt{x}+4}{\sqrt{x}-1}:\left(\dfrac{3\sqrt{x}+1-2\left(\sqrt{x}-1\right)}{\left(\sqrt{x}-1\right)\left(\sqrt{x}+3\right)}\right)\)
\(P=\dfrac{\sqrt{x}+4}{\sqrt{x}-1}:\left(\dfrac{3\sqrt{x}+1-2\sqrt{x}+2}{\left(\sqrt{x}-1\right)\left(\sqrt{x}+3\right)}\right)\)
\(P=\dfrac{\sqrt{x}+4}{\sqrt{x}-1}:\left(\dfrac{\sqrt{x}+3}{\left(\sqrt{x}-1\right)\left(\sqrt{x}+3\right)}\right)\)
\(P=\dfrac{\sqrt{x}+4}{\sqrt{x}-1}.\sqrt{x}-1\)
P=\(\sqrt{x}+4\)
b) \(P=\dfrac{x}{4}+5\)
⇔\(\sqrt{x}+4=\dfrac{x}{4}+5\)
⇔\(\dfrac{x}{4}-\sqrt{x}+1=0\)
⇔\(x-4\sqrt{x}+4=0\)
⇔\(\left(\sqrt{x}-2\right)^2=0\)
⇔\(\sqrt{x}-2=0\)
⇔\(\sqrt{x}=2\)
⇔\(x=4\)
Vậy x=4 thì P=\(\dfrac{x}{4}+5\)
26 tháng 6 2021
Bài 1:
a) Ta có: \(P=\dfrac{\sqrt{x}+4}{\sqrt{x}-1}:\left(\dfrac{3\sqrt{x}+1}{x+2\sqrt{x}-3}-\dfrac{2}{\sqrt{x}+3}\right)\)
\(=\dfrac{\sqrt{x}+4}{\sqrt{x}-1}:\left(\dfrac{3\sqrt{x}+1}{\left(\sqrt{x}+3\right)\left(\sqrt{x}-1\right)}-\dfrac{2\left(\sqrt{x}-1\right)}{\left(\sqrt{x}+3\right)\left(\sqrt{x}-1\right)}\right)\)
\(=\dfrac{\sqrt{x}+4}{\sqrt{x}-1}:\dfrac{\sqrt{x}+3}{\left(\sqrt{x}+3\right)\left(\sqrt{x}-1\right)}\)
\(=\sqrt{x}+4\)
b) Ta có: \(P=\dfrac{x}{4}+5\)
\(\Leftrightarrow\sqrt{x}+4=\dfrac{1}{4}x+5\)
\(\Leftrightarrow\dfrac{1}{4}x-\sqrt{x}+1=0\)
\(\Leftrightarrow x-4\sqrt{x}+4=0\)
\(\Leftrightarrow x=4\)
TV
các bạn lm giúp mk phần a vs ak
1
NM
1
12 tháng 1 2022
Bài 4:
Nhóm 1: x;1/3x; 8x
Nhóm 2: \(x^2;5x^2;-3x^2\)
6P
5
27 tháng 1 2022
\(=\dfrac{7}{20}-\dfrac{1}{4}=\dfrac{7}{20}-\dfrac{5}{20}=\dfrac{1}{10}\)
TA
2
7 tháng 1 2022
Tần số là số lần dao động của vật trong 1s. Đơn vị Hz
Tần số dao động của vật thứ nhất là: 700:10=70H
Tần số dao động của vật thứ hai là: 9000:300=30Hz
Vật 2 dao động âm chậm hơn và vật 1 phát ra âm cao hơn. Vì tần số dao động của vật 1 > vật 2
28 tháng 1 2021
uses crt;
var a:array[1..100]of integer;
i,n,t:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
t:=0;
for i:=1 to n do
if a[i] mod 2<>0 then t:=t+a[i];
writeln('Tong cac phan tu le la: ',t);
readln;
end.
2 tháng 5 2019
My hobby is watching films. I have seen many films. The film I best is Chang Trai Nam Ay. It's comedy moving, which was directed by Quang Huy. It's stars Son Tung M-TP, Hariwon, Hua Vi Van, Ngo Kien Huy and Pham Quynh Anh. The film was made in 2014.
Chang Trai Nam Ay is very hilarious, roman and moving. It's about the young singer who has a cancer. The story of film is based on the real. The ending is very moving, I cried. I love Dinh Phong (by Son Tung) very much.
The special effects and the visuals are good. The music has sweet melody. I the acting very much. The actors play very well. Those are the reasons why I Chang Trai Nam Ay. The cris say it is a good film. I agree, although the film has a lot of scandals and bad comment from some viewers.
KN
2 tháng 5 2019
'My hobby is watching films. I have seen many films. The film I best is Chang Trai Nam Ay. It's comedy moving, which was directed by Quang Huy. It's stars Son Tung M-TP, Hariwon, Hua Vi Van, Ngo Kien Huy and Pham Quynh Anh. The film was made in 2014.
Chang Trai Nam Ay is very hilarious, roman and moving. It's about the young singer who has a cancer. The story of film is based on the real. The ending is very moving, I cried. I love Dinh Phong (by Son Tung) very much.
The special effects and the visuals are good. The music has sweet melody. I the acting very much. The actors play very well. Those are the reasons why I Chang Trai Nam Ay. The cris say it is a good film. I agree, although the film has a lot of scandals and bad comment from some viewers.''
I am writing to give you wonderful news. Richard asked me to marry him and i accepted. I don't know whether you remember him but you both were introduced to each other last year. We are going to get married on September 29th at Saint Agather's church. We both hope your leg will be better and you will be able to come to our wedding. It seems ages since we last saw each other. Anyway, I have to say good-bye now because we have a lot of invitations to send.