Ex 1

1.B

2.A

3.D

4.C

5.A

Ex 2

1.A

2.B

3.C

4.D

5.A

program tinh_ex;

var

       x, ex, gt: real;

       n, i: integer;

begin

       write('Nhap vao so x: '); readln(x);

       n := 10; (* so luong so hang *)

       ex := 1; gt := 1;

       for i := 1 to n do

       begin

              gt := gt * i; (* tinh giai thua i! *)

              ex := ex + power(x, i) / gt; (* tinh tong theo cong thuc *)

       end;

       writeln('Gia tri cua e^', x, ' la: ', ex);

       readln;

end.

program tinh_e;
var x: real;
  n: integer;
  s, t: real;
  i: integer;
begin
  write('Nhap x: '); readln(x);
  write('Nhap n: '); readln(n);
  s := 1; t := 1;
  for i := 1 to n do
    begin
      t := t * x / i;
      s := s + t;
    end;
  writeln('e = ', s);
end.

program Tinh_ex;

function TinhGiaiThua(n: Integer): Integer;

var i, giaiThua: Integer;

begin

giaiThua := 1;

for i := 1 to n do

giaiThua := giaiThua * i;

TinhGiaiThua := giaiThua;

end;

function TinhEx(x: Real; n: Integer): Real;

var i: Integer;

ex, phanTu: Real;

begin

ex := 1;

for i := 1 to n do

begin

phanTu := x / TinhGiaiThua(i);

ex := ex + phanTu; end;

TinhEx := ex;

end;

var x: Real;

n: Integer;

ketQua: Real;

begin

Write('Nhap gia tri cua x: ');

ReadLn(x);

Write('Nhap so luong phan tu n: ');

ReadLn(n);

ketQua := TinhEx(x, n);

WriteLn('Gia tri của ex la: ', ketQua:0:2);

end.

Trong đó ta thấy x=1 là nghiệm bội hai của phương trình ⇒ x=1 không là điểm cực trị của hàm số

Vậy hàm số có 2 điểm cực trị.

Chọn B

E x 1:

The person in my family I really like and also love is my mother. She is a very special person and I cannot imagine what I would be without her.

Physically, my mother is petite. She is only about 5 feet tall, and weighs about 110 pounds. She has fine, black hair and a fair complexion. One thing people often notice is that my mother always takes pride in her appearance. Even now, at the age of 80, my mother is a well dressed, well-groomed and elegant woman, with her fine choice of clothes and matching accessories, jewelry and shoes.

Intellectually, my mother always loves learning. Even after her busy day, she won't go to bed without reading the newspaper. She was one of the few members of her family that completed university. She also has many creative and cultural interests such as literature, music and dance. Through her own enjoyment, she passed on this love of culture to all her children, including me.

Emotionally, my mother has a heart of gold. All her life, she has been ready, willing and able to help anyone who needs anything, with a smile on her face. She is of the old school - she remembers to wish friends and relatives on their birthdays and anniversaries, she attends their weddings, dinners and parties, and she visits them when they're hurt, unwell or in mourning. In fact, my mother has always been a kind soul and people of all ages love her as soon as they meet her. I think this is because she is good-hearted from her core, and her authenticity is what everyone relates to. She has taught me the meaning of being compassionate, loving, kind, helpful, supportive and so much more. In fact, thanks to the unconditional love of both my wonderful parents, I feel I've been truly blessed in this lifetime.

Chúc bạn học tốt!

Đáp án A

Xét hệ giao điểm:

y = e y = 1 − e x + 1 ⇔ y = e x = − 1

 Xét hệ giao điểm: 

y = e x x = e ⇔ x = 1 y = e

Dựa vào hình vẽ ta có: 

S = ∫ − 1 0 e − 1 − e x − 1 d x + ∫ 0 1 e − e x d x

= ∫ − 1 0 e − 1 x + 1 d x + e x − e x 0 1 = e − 1 x 2 2 + x − 1 0 + 1 = 1 2 e − 1 + 1 = 1 2 e + 1

1 I wish I had a washing machine 

2 I wish I lived near my work

3 I wish our garden got some sun

4 I wish I hadn't called him a lier

5 I wish I knew French

6 I wish I had booked a seat

7 I wish I could drive

8 I wish Tom drove more slowly

9 I wish you kept quiet

10 I wish he had worked harder during the term

11 I wish you came with us

12 I wish it stopped raining

13 I wish I could swim

14 I wish you waited for me

15 I wish I could help you now

Bài 2

1 knew

2 had gone

3 would lend

4 were

5 had spent

6 were lying

7 didn't have

8 lived

10 could speak

11 had visited

12 would play

13 could get

14 didn't complain

15 were