Предмет: Алгебра, автор: a17320432a

распишите пожалуйста, как это решать

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Ответы

Автор ответа: Abilay1411
0
2.
а) 2^x=a
a^2-3a+2=0
(a-2)(a-1)=0
a=2 a=1
2^x=2
x=1
2^x=1
x=0
б)
log2(x)+3log2(x)=8
4log2(x)=8
log2(x)=2
x=4
3.
а) 3^x(9-2×3+1)<12
3^x×4<12
3^x<3
x<1
(-беск; 1)
б) (log2(x))^2-3log2(x)-4<=0
log2(x)=a
a^2-3a-4<=0
(a-4)(a+1)<=0
--------(-1)-------(4)------- это относится к "а"
а=log2(x)
значит
-------(1/2)---------(16)------
[12 ; 16]
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Нужно как можно быстрее решить, пожалуйста:
1 - Put the verb in brackets in the form of Gerund.

1.
She likes (paint) .

2.
I can’t bear (listen) to classic music

3.
He enjoys (play) football .

4.
Leila dreams of (set) up her own
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5.
He is interested in (emigrate) to USA.

6.
Are you good at (dance)?


2 - Make sentences in the correct order.

1. wear/ hair/ They/ their/ long.

2. They/ extravagant/ and/ love/ hair/ dresses/
styles.

3. old/ black/ / They/ wear/ jeans.

4. their/ noses/ They/ pierce/ with/ and/ ears/ pins.


3 - Choose the right variant.

1.
He
is good ________making things.
a) to;
b) at;
c) with;
d) of;

2.
They
always keep_______ the latest fashion trends.
a) of;
b) by;
c) with; d) at;

3.
My
brother _______hours in front of his computer. He is such a computer geek.
a)
listen; b) wear;
c) spend; d) study;

4.
A
________is a fan of hip-hop music and
culture.
a) punk
rockers; b) hip-hoppers; c)
hang-out; d) heavy metal

5.
A
______is a place where a person spends a lot of time.
a) urban
culture b) fashion victims; c)
hang-out; d) athletics ;

6.
They
are extremely well-behaved, which is why they are almost always teacher`s pets.
a) preps;
b) emos; c) computer geeks; d) punk rockers;

7.
They
spend most of their free time in a gym and they like PE.
a) heavy
metal fans; b) athletes; c) preps; d)
hip-hoppers;

8.
I
am_____by Ukrainian and our culture.
a) loves;
b) fascinated; c) enjoys; d) fashion- conscious;

9.
They
wear their hair long.
a) punks;
b) new Age travelers; c) preps; d) hippies;

10. Their pierce their noses and ears with pins.
a) punks;
b) heavy metal; c) preps; d) computer geeks;

4 . Make up one sentence from two (using perfect gerund).
1. I have seen this film. I am sure.
2.She has bought two pens. She remembers.
3. He has lost his keys. He is sorry.
4. They have learnt this rule. They remember.
5. Write some sentences:
Why do teenagers like to be different?