Предмет: Алгебра, автор: nastafomenko915

Те которые обеденные, помогите решить пожалуйста ​

Приложения:

Ответы

Автор ответа: Ляляляля109
1

1) \sqrt[5]{3x-1} =-1\\\\(\sqrt[5]{3x-1} )^{5}=(-1)^{5}\\\\3x-1=-1\\\\3x=0\\\\x=0

4) \sqrt{3x-1}=\sqrt{9-2x}  \\\\(\sqrt{3x-1})^{2}=(\sqrt{9-2x})^{2}\\\\3x-1=9-2x\\\\5x=10\\\\x=2

5) \sqrt{3x-1}=\sqrt{1-3x}\\\\(\sqrt{3x-1})^{2}=(\sqrt{1-3x})^{2}  \\\\3x-1=1-3x\\\\6x=2\\\\x=\frac{1}{3}

6) \sqrt{3x-1}=\sqrt{4x+1} \\\\(\sqrt{3x-1})^{2}=(\sqrt{4x+1} )^{2}\\\\3x-1=4x+1\\\\x=-2

В 6 пункте х не может быть равен -2, так как под корнем получится отрицательное число. Поэтому там ∅( пустое множество)

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CРОЧНО! 98 баллов!

Вставь have или has .

You ___ helped your mother.

I ___ drawn a picture.

My mother ___ made a pudding.

My father ___ repainted the cupboard.

My parents ___ cleaned the carpet.

The friends ___ drawn a poster.

We ____ repainted the door.

They ____ washed the dishes.

Раскрой скобки и поставь глагол в Present Perfect

John (paint) two pictures.

Jill (feed) her hamster.

The children (play) computer games.

I (open) the window.

She (do) her homework

He (make) animals from clay.

3 Раскрой скобки используя Present Perfect

___ you (roller-skate) ?

___ Jack (watch) TV ?

___ your friends (buy) gifts ?

___ Jane (swim) in the river ?

___ you (go) boating ?

___ the children (help) their mother ?

___ Sparky (eat) the flower ?

4 Исправь ошибки

1 I has worked.

2 She not helped her parents.

3 Jack has bought a new car?

4 What they have painted?

5 Helen not has changed her bedroom.

6 His father put books in the bookcase.


_______________________________________________________________________________________________

1Вставь have или has .

You ___ helped your mother.

I ___ drawn a picture.

My mother ___ made a pudding.

My father ___ repainted the cupboard.

My parents ___ cleaned the carpet.

The friends ___ drawn a poster.

We ____ repainted the door.

They ____ washed the dishes.

Раскрой скобки и поставь глагол в Present Perfect

John (paint) two pictures.

Jill (feed) her hamster.

The children (play) computer games.

I (open) the window.

She (do) her homework

He (make) animals from clay.

3 Раскрой скобки используя Present Perfect

___ you (roller-skate) ?

___ Jack (watch) TV ?

___ your friends (buy) gifts ?

___ Jane (swim) in the river ?

___ you (go) boating ?

___ the children (help) their mother ?

___ Sparky (eat) the flower ?

4 Исправь ошибки

1 I has worked.

2 She not helped her parents.

3 Jack has bought a new car?

4 What they have painted?

5 Helen not has changed her bedroom.

6 His father put books in the bookcase.