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a) Đúng, v ì √ 0 , 0001 = √ 0 , 01 2 = 0 , 01
b) Sai, vì vế phải không có nghĩa.
(Lưu ý: √A có nghĩa khi A ≥ 0)
c) Đúng, v ì 7 = √ 7 2 = √ 49 > √ 39
6 = √ 6 2 = √ 36 < √ 39
d) Đúng, v ì 4 - √ 13 = √ 4 2 - √ 13 = √ 16 - √ 13 > 0
Do đó: (4 - √13).2x < √3(4 - √13) (giản ước hai vế với (4 - √13))
⇔ 2x < √3
a) 92 : 0,01 = 9200 92 x 100 = 9200 64 : 0,01= 6400
b) 25 : 0,5 = 50 25 x 2 = 50 39 : 0,5 = 78
c) 32 : 0,25 = 128 32 x 4 = 128 15 : 0,25 = 60
bài này không nhất thiết phải cho biết nhiệt độ và thể tích bang đầu ; nhưng vì bn cho rồi nên mk lm luôn
bn nói thế này mk o bt là nhiệt độ giảm 10% đối với độ k hay độ C ; nên mk lấy độ C nha .
áp dụng phương trình trạng thái
ta có : \(\dfrac{pv}{T}=const\Leftrightarrow\dfrac{p_1v_1}{T_1}=\dfrac{p_2v_2}{T_2}\Leftrightarrow\dfrac{p_1.10}{546}=\dfrac{p_2.12}{518,7}\)
\(\Rightarrow\dfrac{p_2}{p_1}=\dfrac{19}{24}\) \(\Rightarrow\) áp suất giảm \(\dfrac{5}{24}\)
a) Sai
Sửa lại: for i:=10 downto 1 do write('a');
b) Đúng
c) Đúng
10, '' My parents are arriving tomorrow'', they said
She said that her parents were arriving the day after
11 ''We'll see her this morning''thay said.
they said that they would see her that morning
12 ''We'll see her next summer'' thay said
They said that they would see her the next summer
13'' They were here three months ago'', he said
he said that they had been there 3 months ago
10, She said that her parents were arriving the next day.
11, They said that they would see her that morning.
12, They said that they would see her the following summer.
13, He said that were there three months before.
theo mình thì câu 1 của bạn đúng còn câu 2 thì có dấu ngoặc đơn ở 20*3+20 nên nó sẽ in ra thành 20*3+20=20*3+20.
7.Don't talk to me now. I.....am writing......[write] an imprortant letter.
8.Why......do they drive......[they/drive] on the left in Britain?
9.It......doesn't get......[not/get] dark at this time of year until about 10 o'clock.
10.A: What are you doing?
B:I......am baking......[bake] a cake. Why....are you smiling.........[you/smile]? [I/do]......Am I doing........ something wrong?
11.A: ''There's someone at the door.'' B:''I.......am getting......[get] it.''
12.Joan thinks the Conservatives........will win........[win] the next election.
13.A:''I'm moving house tomorrow.'' B:''I......will come........[come] and help you.''
14.If she passes the exam,she.......will be.......[be] very happy.
15. I......will be........[be] there at four o'clock, I promise.
16. A:''I'm cold.'' B:''I........will turn......[turn] on the fire.''
17. A:''She's late'' B:''Don't worry she......will come.......[come].''
18.The meeting.........will take.........[take] place at 6 p.m
19.If you eat all of that cake, you.......will feel......[feel] sick.
20.They......will be.......[be] at home at 10 o'clock.
7.Don't talk to me now. I.....am writing......[write] an imprortant letter.
8.Why......do they drive......[they/drive] on the left in Britain?
9.It......doesn't get......[not/get] dark at this time of year until about 10 o'clock.
10.A: What are you doing?
B:I......am baking......[bake] a cake. Why....are you smiling.........[you/smile]? [I/do]......Am I doing........ something wrong?
11.A: ''There's someone at the door.'' B:''I.......am getting......[get] it.''
12.Joan thinks the Conservatives........will win........[win] the next election.
13.A:''I'm moving house tomorrow.'' B:''I......will come........[come] and help you.''
14.If she passes the exam,she.......will be.......[be] very happy.
15. I......will be........[be] there at four o'clock, I promise.
16. A:''I'm cold.'' B:''I........will turn......[turn] on the fire.''
17. A:''She's late'' B:''Don't worry she......will come.......[come].''
18.The meeting.........will take.........[take] place at 6 p.m
19.If you eat all of that cake, you.......will feel......[feel] sick.
20.They......will be.......[be] at home at 10 o'clock.
Hãy cho bt đâu là lệnh lặp for...do để in chữ O
A for i:=1.5 to 10.5 do writeln('o');
B for i:=1 to 10 do writeln('O');
C for i:=100 to 1 do writeln('o')
D for i:=1 to 10 do; writeln('o')
a:0.1 -a:0.25 =39
a:(0.25-0.1)=39
a:0.15=39
a=39*0.15
a = 5.85
k mik nha ♥
39 ÷ 0,01 - 39 ÷ 0,1 + 39 × 10
= 39 x 100 - 39 x 10 + 39 x 10
= 39 x ( 100 - 10 + 10 )
= 39 x 100
= 3900
/HT\
= 3900 nhá bạn
[ HT ]