Giúp em giải í b gấp ạ mai em ktr rồi ạ, mong anh thịnh giúp em sớm ạ trong pascal ạ
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Những câu hỏi liên quan
3N
1
YN
2 tháng 3 2022
1 The distance from my home to school is about 3 km
2 My mum used to live in a small village when she was small
3 Despite being a millionaire , he lives in a small flat
4 when does the festive take place ?
5 It is about two kilometres from my home to school
6 he didn't use to ride his bike to school
7 Despite having a test tomrrow , they are still watching TV now
21 tháng 4 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
t:=t+a[i];
writeln(t);
readln;
end.
H
1 tháng 11 2023
Bài `13`
\(a,\sqrt{27}+\sqrt{48}-\sqrt{108}-\sqrt{12}\\ =\sqrt{9\cdot3}+\sqrt{16\cdot3}-\sqrt{36\cdot3}-\sqrt{4\cdot3}\\ =3\sqrt{3}+4\sqrt{3}-6\sqrt{3}-2\sqrt{3}\\ =\left(3+4-6-2\right)\sqrt{3}\\ =-\sqrt{3}\\ b,\left(\sqrt{28}+\sqrt{12}-\sqrt{7}\right)\cdot\sqrt{7}+\sqrt{84}\\ =\left(\sqrt{4\cdot7}+\sqrt{4\cdot3}-\sqrt{7}\right)\cdot\sqrt{7}+\sqrt{4\cdot21}\\ =\left(2\sqrt{7}+2\sqrt{3}-\sqrt{7}\right)\cdot\sqrt{7}+2\sqrt{21}\\ =2\cdot7+2\sqrt{21}-7+2\sqrt{21}\\ =14+2\sqrt{21}-7+2\sqrt{21}\\ =7+4\sqrt{21}\)
LC
1
5 tháng 8 2021
37
ta thấy khi cân bằng nhiệt mực nước giảm 0,5cm chứng tỏ đá tan
\(=>\Delta h=0,45-0,25=0,2m\)
\(=>Dđ.V2=Dn.V1=>900.S.h=Dn.S\left(h-0,005\right)\)
\(=>h=0,05m< 0,25m\)=>đá chưa tan hết\(=>tcb=0^oC\)
\(=>Qtoa=Dn.S.\Delta h.t1.4200=1000.S.0,2.t1.4200=840000St1\left(J\right)\)
\(=>Qthu1=0,25.S.Dđ.2100.20=9450000S\left(J\right)\)
\(=>Qthu2=S.0,05.900.340000=15300000S\left(J\right)\)
\(=>840000St1=24750000S=>t1=29,5^oC\)
QN
0
TP
0
JT
2
19 tháng 12 2021
Công thức tính lực đẩy Achimedes:
FA = d . V
Trong đó:
FA là Lực đẩy Achimedes (đơn vị N)
d là khối lượng riêng của chất lỏng (đơn vị N/m3)
V là thể tích phần chất lỏng bị chiếm chỗ (đơn vị m3)
LT
24 tháng 3 2023
5. Tea is not as good as coffee.
6. Lan is not as tall as Lan.
7. The bus isn't as fast as the train.
8. Motorbikes aren't as convenient as cars.
9. Her suitcase is not as big as his one.
10. Your backpack is not as new as mine.
35. Although Ben wanted to study in France, his French was bad.
36. The fastest way to travel from Ho Chi Minh City to Ha Noi is flying.
37. Jane has a small old white house.
38. Your brother is not as young as mine.
39. They don't have to work at weekends.
40. He was late again, so I was really angry.
Í B nhé
uses crt;
var xa,ya,xb,yb,xc,yc,p,s,ab,bc,ac:real;
begin
clrscr;
readln(xa,ya,xb,yb,xc,yc);
ab:=sqrt(sqr(xa-xb)+sqr(ya-yb));
ac:=sqrt(sqr(xa-xc)+sqr(ya-yc));
bc:=sqrt(sqr(xb-xc)+sqr(yb-yc));
p:=(ab+bc+ac)/2;
s:=sqrt(p*(p-ab)*(p-ac)*(p-bc));
writeln(s:4:2);
readln;
end.