ở chuột tính trạng màu lông nâu là trội hoàn toàn so với tính trạng lông đen.khi chuột lông nau thần chủng lai với chuột lông đen thuần chủng thu được F1 hãy biện luận và lập sơ đồ lai từ P đến F1

làm nhanh giùm mik với

Giả thiết là \(a,b\ge0\)thì chuẩn hơn.

\(\left(a+b\right)^2=a^2+b^2+2ab=1+2ab\ge1\text{ }\Rightarrow\text{ }a+b\ge1\)

Dấu bằng xảy ra khi \(2ab=0\Leftrightarrow\orbr{\begin{cases}a=0\\b=0\end{cases}}\)

Ta có: \(\left(a-b\right)^2\ge0\Rightarrow\text{ }\left(a+b\right)^2\le2\left(a^2+b^2\right)\)

\(\Rightarrow\left(a+b\right)^2\le2\Rightarrow a+b\le\sqrt{2}\)

Dấu bằng xảy ra khi \(a-b=0\Leftrightarrow a=b\)

\(P=\sqrt{1+2a}+\sqrt{1+2b}\)

Max: Áp dụng bđt đã sử dụng ở trên: \(\left(x+y\right)^2\le2\left(x^2+y^2\right)\)

\(P^2\le2\left(1+2a+1+2b\right)=4\left(a+b\right)+4\le4\sqrt{2}+4\)

\(\Rightarrow P\le\sqrt{4+4\sqrt{2}}=2\sqrt{1+\sqrt{2}}\)

Dấu bằng xảy ra khi \(a=b=\frac{1}{\sqrt{2}}\)

Min: Dùng bđt \(\sqrt{1+x}+\sqrt{1+y}\ge1+\sqrt{1+x+y}\text{ (1)}\left(x;\text{ }y\ge0\right)\)

\(\left(1\right)\Leftrightarrow1+x+1+y+2\sqrt{1+x}\sqrt{1+y}\ge1+1+x+y+2\sqrt{x+y+1}\)

\(\Leftrightarrow\sqrt{1+x}\sqrt{1+y}\ge\sqrt{1+x+y}\)

\(\Leftrightarrow xy+x+y+1\ge x+y+1\)

\(\Leftrightarrow xy\ge0\)

Do bđt cuối dúng với mọi \(x,y\ge0\) nên (1) đúng.

Dấu bằng xảy ra khi \(xy=0\Leftrightarrow\orbr{\begin{cases}x=0\\y=0\end{cases}}\)

\(P\ge1+\sqrt{1+2\left(a+b\right)}\ge1+\sqrt{1+2}=1+\sqrt{3}\)

Dấu bằng xảy ra khi \(\orbr{\begin{cases}a=0;\text{ }b=1\\a=1;\text{ }b=0\end{cases}}\)

55

k mk thì mk k lại cho

3²ⁿ và 2³ⁿ

3²ⁿ = (3²)ⁿ = 9ⁿ

2³ⁿ = (2³)ⁿ = 8ⁿ

Vì 9ⁿ > 8ⁿ

Vậy 3²ⁿ > 2³ⁿ

Choose the best option to complete the sentence.

1)My teacher suggested I..................harder to pass the exam.

A.studies B.study C.studying

2)The professor suggested he.................the research before March.

A.summit B.summiting C.summits

3)Her leader suggested he...................on time.

A.being B.be C.is

4)Linh suggests they...................a meeting every week.

A.shoud have B.have C.both are correct

5)The coacher suggested that they.......................a Facebook group.

A.have B.has C.having

6)Her parents suggest she..................married as soon as possible.

A.get B.gets C.got

7)We have suggested .................... to london for this winter vacation.

A.going B.go C.should go

8)My older brother suggests that I.......................tennis to have good health.

A.(should)play B.playing C.plays

9)We suggest...................a postcard to our grandmother.

A.send B.sending C.sent

10)I suggested that we ....................Peter to the party.

A.should invite B.invite C.both are correct

11)It's so cold outside.We suggest...................the window.

A.should close B.close C.closing

12)My mom suggests that I......................for some part-time jobs to earn more money.

A.look B.looking C.looks

13)Henry has suggested...................to the park for a walk.

A.went B.goes C.going

14)The government suggests............................by bus to reduce the environmental pollution.

A.travel B.travelling C.travelled

15)My roommate suggested that we........................more vegetables and fruit.

A.should eat B.eating C.ate

Tổng bằng:

11+44=55

Đáp số: 55

Choose the best option to complete the sentence.

1)My teacher suggested I..................harder to pass the exam.

A.studies B.study C.studying

2)The professor suggested he.................the research before March.

A.summit B.summiting C.summits

3)Her leader suggested he...................on time.

A.being B.be C.is

4)Linh suggests they...................a meeting every week.

A.shoud have B.have C.both are correct

5)The coacher suggested that they.......................a Facebook group.

A.have B.has C.having

6)Her parents suggest she..................married as soon as possible.

A.get B.gets C.got

7)We have suggested .................... to london for this winter vacation.

A.going B.go C.should go

8)My older brother suggests that I.......................tennis to have good health.

A.(should)play B.playing C.plays

9)We suggest...................a postcard to our grandmother.

A.send B.sending C.sent

10)I suggested that we ....................Peter to the party.

A.should invite B.invite C.both are correct

11)It's so cold outside.We suggest...................the window.

A.should close B.close C.closing

12)My mom suggests that I....................for some part-time jobs to earn more money.

A.look B.looking C.looks

13)Henry has suggested.......................to the park for a walk.

A.went B.goes V

Choose the best option to complete the sentence.

1)My teacher suggested I..................harder to pass the exam.

A.studies B.study C.studying

2)The professor suggested he.................the research before March.

A.summit B.summiting C.summits

3)Her leader suggested he...................on time.

A.being B.be C.is

4)Linh suggests they...................a meeting every week.

A.shoud have B.have C.both are correct

5)The coacher suggested that they.......................a Facebook group.

A.have B.has C.having

6)Her parents suggest she..................married as soon as possible.

A.get B.gets C.got

7)We have suggested .................... to london for this winter vacation.

A.going B.go C.should go

8)My older brother suggests that I.......................tennis to have good health.

A.(should)play B.playing C.plays

9)We suggest...................a postcard to our grandmother.

A.send B.sending C.sent

10)I suggested that we ....................Peter to the party.

A.should invite B.invite C.both are correct

11)It's so cold outside.We suggest...................the window.

A.should close B.close C.closing

12)My mom suggests that I......................for some part-time jobs to earn more money.

A.look B.looking C.looks

13)Henry has suggested...................to the park for a walk.

A.went B.goes C.going

14)The government suggests............................by bus to reduce the environmental pollution.

A.travel B.travelling C.travelled

15)My roommate suggested that we........................more vegetables and fruit.

A.should eat B.eating C.ate

Rewrite the following sentences starting with the given words.

1)People say that he has been all over the world.

=>It................................................................................................

=>He..............................................................................................

2)It is believe that the man is 108 years old.

=>People......................................................................................

=>The man...................................................................................

3)People believe that Omachi is from Quang Nam.

=>It................................................................................................

=>Omachi......................................................................................

4)They think that Danny can clean the floor.

=>It................................................................................................

=>Danny........................................................................................

5)People think that Mai Chi has been punished by the teacher.

=>It................................................................................................

=>Mai Chi.....................................................................................

6)People believe that he worker very hard.

=>It................................................................................................

=>He.............................................................................................

7)It is said that they work 14 hours a day.

=>They..........................................................................................

=>People.......................................................................................

8)Someone thinks that Lan will return tomorrow.

=>It................................................................................................

=>Lan............................................................................................

9)People think that Lan is living near here.

=>It................................................................................................

=>Lan............................................................................................

10)They think that she is hiding in the forest.

=>It................................................................................................

=>She............................................................................................

GTLN của C là -3 của D là15

tick đúng cho mik nha