trình bày cách phân loại cây công nghiệp. Mn giúp mình nha

CMR \(\dfrac{a+b}{2}\le\sqrt{\dfrac{a^2+b^2}{2}}\)với a, b là số thực tùy ý

giúp mình nha

Tìm max, min của hàm số f(x)=\(2\sqrt{x-4}+\sqrt{8-x}\)

Giúp mình nha

giải pt

a)\(x^4-2x^2-2x+1=0\)

b)\(x^4-x^2-2x-1=0\)

giúp mk vs

\(\dfrac{1-cos^2\left(90^0+x\right)}{1-\sin^2\left(90^0-x\right)}-\cot\left(90^0-x\right).\tan\left(x+90^0\right)\)

Rút gọn. x là 1 góc nhé. giúp mình đi mn

cho (d): y=2x+m-1. Tìm m để (d) cắt trục Ox, Oy lần lượt tại M và N sao cho diện tích tg MON=1

Rewrite

1) It is too hot for my son to eat.

➝ ................It isn't cold enough for my son to eat...................

2) We didn't visit Ba Vi Nationnal Park yesterday because weather was bad.

➝ The bad weather kept us from visiting Ba Vi NationalPark

3) Quan bought that dictonary last year.

➝ That dictonary..............was bought by Quan last year.....................

4) Mr. Minh can't answer my question.

➝ My question................can't be answered by Mr. Minh.....................

Combine each pair of sentences, using BECAUSE, SINCE, AS.

1. she saw the wanted man in a small coffee shop. She phoned the police.

--->She phoned the police because she saw the wanted man in a small coffee shop

2. She walked slowly. Her leg was injured.

--->She walked slowly because her leg was injured

3. He came to office 10 minutes late. He missed the first bus.

--->He ame to office 10 minutes late because he missed the first bus

4. She coughed and sneezed. The doctor said she ahs to stay out of crowd.

--->The doctor said she has to saty out of crowd because she coughed and sneezed

GIÚP MÌNH VỚI

adverbs clauses of results(mệnh đề trạng ngữ chỉ kết quả)

the picture is too high for me to couch

........................The picture isn't hight for me to cough................................

my sister is old enough to stay at home alone

................................My sister is too young to stay at home alone...................................

the book are very interesting.i want to read them again (book mà dùng are)

..................................The books are interesting enough for me to read them again ...................................................

the car is too expensive .we can't buy it

.................................The car isn't cheap enough for me to buy it...........................................

the chidren could't go swimming beacause the sea was rough

the sea was rough so........................the children couldn't go swimming...........................................

the sea prevented .........................the children from swimming here..................................

we stopped playing soccer beacause it rained heavily

it rained so.............................we stopped playing soccer..................................

the heavy rain prevented....................us from playing soccer ..........................

the bags are so heavy that i can't bring it

i'm not..................................bringing the bags becase they so heavy....................................

the tree is too high for him too reach

he isn't .......................reach the tree because it too high..........................

nhan is tired .he can't fly his kites

nhan is so...................tired that he can't fly his car.........................

the bag is very heavy .i can't carry it

this bag is too..................heavy for me to carry it.......................