K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

\(B=\dfrac{2\sqrt{x}-3}{\sqrt{x}-1}+\dfrac{3-\sqrt{x}}{x-1}\)

\(=\dfrac{2\sqrt{x}-3}{\sqrt{x}-1}+\dfrac{3-\sqrt{x}}{\left(\sqrt{x}-1\right)\left(\sqrt{x}+1\right)}\)

\(=\dfrac{\left(2\sqrt{x}-3\right)\left(\sqrt{x}+1\right)+3-\sqrt{x}}{\left(\sqrt{x}-1\right)\left(\sqrt{x}+1\right)}\)

\(=\dfrac{2x+2\sqrt{x}-3\sqrt{x}-3+3-\sqrt{x}}{\left(\sqrt{x}-1\right)\left(\sqrt{x}+1\right)}\)

\(=\dfrac{2x-2\sqrt{x}}{\left(\sqrt{x}-1\right)\left(\sqrt{x}+1\right)}=\dfrac{2\sqrt{x}}{\sqrt{x}+1}\)

14 tháng 11 2021

Mọi người ơi, mình đang cần gấp giúp mình vs ạ

 

Mình cái đề Anh cơ bản vừa làm xong. Các bạn check giúp mình có sai câu nào không ạ. Cảm ơn!!! Link docs: https://docs.google.com/document/d/1VdSUSNFPdKgWN9h2PNOEt4zbPIu6UOMFkzGBtLVJvMA/edit?usp=sharingNỘI DUNG KIỂM TRAThere isn’t ....... milk in the jar. *someanymanyaThat shop doesn’t have ……….. kinds of cheese *muchmanysomeaChọn câu đúng *I play often basketball after workI often play basketball after workI play basketball often after workI play basketball after work...
Đọc tiếp

Mình cái đề Anh cơ bản vừa làm xong. Các bạn check giúp mình có sai câu nào không ạ. Cảm ơn!!! Link docs: https://docs.google.com/document/d/1VdSUSNFPdKgWN9h2PNOEt4zbPIu6UOMFkzGBtLVJvMA/edit?usp=sharing

NỘI DUNG KIỂM TRA

There isn’t ....... milk in the jar. *

some

any

many

a

That shop doesn’t have ……….. kinds of cheese *

much

many

some

a

Chọn câu đúng *

I play often basketball after work

I often play basketball after work

I play basketball often after work

I play basketball after work often

His jacket is ………. the wardrobe *

in

between

in front of

opposite

The children are having a party. ………… are happy *

They

We

You

I

You can read books and newspapers at a __________. *

coffee shop

movie theater

bank

library

Martin likes reading. ……………. father tells the story. *

He

It

Its

His

Chọn câu đúng *

Bill can drive his car

Bill can drive car his

Bill cans drive he car

Bill cans drive car he

Chọn từ khác *

board games

martial arts

weights

gymnastics

The TV is ………….. the cat and the dog *

in

up

down

between

How ……… eggs do you buy? *

many

much

does

do

You play rugby on a pitch. Where do you ………… badminton? *

do

play

go

take

Would you like ...... water, please? *

much

many

any

some

My sister is a pilot. She ________ all over the world. *

flys

flyes

flies

to fly

Chọn câu đúng *

How many strawberries are there?

How many strawberries is there?

How much strawberries are there?

How much strawberries is there?

He used to……. jogging every morning when he was a young boy. *

go

take

play

do

Chọn câu đúng *

Mother my cans make a cake

Mother my can make a cake

My mother can make a cake

My mother cans make a cake

He ________a big breakfast every morning *

doesn’t have

doesn’t has

don’t has

don’t have

You can have dinner and stay overnight ……………………. *

restaurant

hotel

supermarket

shopping mall

We go ………… the wall to see flowers *

through

along

past

in

What time ________ Lan ________ her classes every Friday? *

do/finish

does/finish

do/finishes

does/finishes

I have pictures of my family ……….. the wall in my room. *

in

under

on

behind

Chọn từ khác *

steak

soup

chicken

fish

He eats ……………… banana after his dinner. *

many

much

an

a

You can get money or traveler’s checks ………………….. *

train station

hotel

bank

library

Chọn câu đúng *

Is there some chicken?

Is there any chicken?

Are there many chicken?

Are there some chicken?

 I …………. the housework with my brother *

do

does

am do

am does

Chọn câu đúng *

She have two daughters

She has two daughters

She is have two daughters

She is has two daughters

Karate is a great exercise for me but learning how to ……. karate well takes a lot of time. *

play

take

do

go

Chọn câu đúng *

There is a parks

There is department store?

There is good coffee shops?

There is a movie theater

How ………….. flour do you need to make this cake? *

do

does

much

many

Tiffany and Rosy usually help their mom …….. the chores at the weekend. *

play

go

take

do

Chọn từ khác *

bread

milk

sandwich

bacon

Dumbo is an elephant. ………. is 2 months old. *

I

They

It

You

He doesn’t have …… rice *

some

a

many

much

Chọn từ khác *

sister

mother

teacher

father

She’d like ....... orange. *

an

a

many

some

Where do you live? What’s ………… address? *

you

your

I

my

You can buy a one-way or round-trip train ticket at a ………… *

library

bank

train station

restaurant

Chọn câu đúng *

There aren’t some tomatoes in the kitchen

There aren’t much tomatoes in the kitchen

There aren’t many tomatoes in the kitchen

There aren’t a tomatoes in the kitchen

1
5 tháng 1 2022

leu

 

17 tháng 6 2017

Hòa có 20 tập đề bài có sẵn rùi mà

17 tháng 6 2017

thì theo đề bạn hòa có 20 quyển tập vậy cũng hỏi

25 tháng 6 2018

(oh) hóa trị 1 mà zn hóa trị 2=> cthh la zn(oh)2

với lại ko có oh2 dau chi co OH hoac la H2O

25 tháng 6 2018

phải viết là Zn(OH)2 vì nhóm (OH) hóa trị I

29 tháng 2 2016

uk , thế à , chuyện liên quan đến toán thế -_-

1 tháng 1

-7/(1 + 2x) = 5(2 - 3x)

-7(2 - 3x) = 5(1 + 2x)

-14 + 21x = 5 + 10x

21x - 10x = 5 + 14

11x = 19

x = 19/11

8 tháng 3 2017

Câu nào? Bạn nói rõ hơn được không?

12 tháng 11 2021

Số tiền Bình có là:

   105 000-27 000=78 000(đồng)

Số tiền Chi có là:

   105 000+36 000=141 000(đồng)

Trung bình mỗi bạn có số tiền là:

   105 000+78 000+141 000=...(đồng)

   Đáp số:.. đồng.

5 tháng 12 2023

29576:24

123×45