Câu 2: 

uses crt;

var i,n,t:integer;

begin

clrscr;

n:=0;

t:=0;

repeat

n:=n+1;

t:=t+n;

until t>100;

writeln(t);

readln;

end.

C2:

var i,s: integer;

begin

while s<=100 do begin

s:=s+i;

i:=i+1;

end;

write(s);

readln

end.

Chuyển những câu sau đây sang câu gián tiếp:

1, Teacher said to Gorgh,: Be carefull. Think before you answer"

→ Teacher advised Gorgh .......to be careful and think before he answered...............................

2, The secretary said to us," Write names at the top of your paper and answer 4 questions"

→ The secretary asked us...............to write names at the top of our paper and answer 4 questions.......................

3, "Don't forget to turn off the light before you go to bed, Niên". Nien's aunt said to her

→ Nien 's aunt told her......................not to forget to turn off the light before she went to bed ..........................

4, " Can you help my son with his English?" . Mrs.Mai asked her friend

→Mrs. Mai asked her friend............to help her son with his English ....................

5, "Can you get back home at 9.30?"

→Loan's father told her..................to get back home at 9.30..............................

6, "Get up early to learn your lesson"

→Toan's mother told him.........to get up early to learn his lesson......................

A

C

c

gợi lên điều là mẹ đang dần hiện về

Ai giúp tui nha tụi chân thành cảm ơn đấy 😁😁😁😁😁😁😁😁🤩🤩🤩😍😍😍😍😘😘😘😚😚😚😙😙😙😗😗😍🤗🙃🙃😭😭😂

a: \(\Leftrightarrow2x\left(x+2\right)+4>x^2+4x+4\)

\(\Leftrightarrow2x^2+4x-x^2-4x>0\)

=>x<>0

b: \(\Leftrightarrow3\left(1-2x\right)-24x< 4\left(1-5x\right)\)

=>3-6x-24x<4-20x

=>-30x+3<4-20x

=>-10x<1

hay x>-1/10

c: \(\Leftrightarrow x^2+6x+8>x^2+10x+16+26\)

=>6x+8>10x+42

=>-4x>34

hay x<-17/2

1) \(=\left(9x^2-25y^2\right)-\left(6x-10y\right)=\left(3x-5y\right)\left(3x+5y\right)-2\left(3x-5y\right)=\left(3x-5y\right)\left(3x+5y-2\right)\)

2) \(=9x^2y^2-\left(x^2-2xy+y^2\right)=9x^2y^2-\left(x-y\right)^2=\left(3xy-x+y\right)\left(3xy+x-y\right)\)

6B

10C

8A