Hometask

In 250 words or less prepare your personal statement on the topic below:

-Do you think about how much waste you and your family create? Would you like to become an eco-friendly family? If so, what would you do to reduce the waste and help the environment?

My family is eco-friendly.
In our family we care about nature. We think about reusing different things. We don`t throw away used cans or paper sacks,we
reuse them, besides we recycle paper.
We collect old newspapers and take them to the special centre.
More than that, we try to reduce water spending.
I think it helps to save nature.

The most important international news today. (In 150 words or less prepare your personal statement on the topic)

The media world has become increasingly important in the 21st Century since the advent of the internet. News can be fetched and easily accessible regardless geographical position of the reader. Recently, an argument on whether it is better to focus on local or international news has sparked a debate. Both views will be discussed and analysed before a reasoned conclusion can be reached.

On the one side, people tend to focus on local news as they are more relevant to their daily life. For instance, majority Malaysian follow the national political development as it impacts various aspects of their life including finance, health and education. The relevancy of local news allows people to express their concerns and to discuss the current issues happening around them. This point shows the importance of following up the national news over international news.

On the other side, some people think it is crucial to be aware of international news due to the competitiveness of this globalized world. For example, China has emerged as the fastest growing nation in term of economy and a lot of countries are trading with it. The current affairs of China in this example are viewed and deemed as important as it could affect the currency values and subsequently the trade market. From this point, it seems that international news is worth to be aware of by some people.

In view of the two arguments discussed, it is difficult to decide which side has more significance to the reader. It is concluded that both national and international news are equally important and thus readers are encouraged to read news relevant to them.

Թեմա։ Լոգարիթմական հավասարումներ

Վարժ.88

ա)log7 (3x-29)=2=26

բ)lg(2x-7)=-1=3,55

գ)log0.7 (8x-23)=0=5

դ)log0.2 (5x+10)=-2=3

Վարժ.89

ա)log3 (x2 -2x+19)=3=-2

բ)log2 (7x2 +8x+2)=0=-1

գ)log1/3 (x2 +7x+3)=-4=-1/7

դ)log1/4 (3x2 +4x-4)+2=0=-13

Վարժ.90

ա)log3 (x-1)=log3 5+log3 2=11

բ)lg(2x-5)=2lg3+1=32

գ)log5 (x+4)=3log5 2+log5 3=23

դ)log1/5 (5x-7)+1=2lod1/5 6=37.4

Վարժ.91

ա)log4 (5x+3)=log4 (7x+5)=0

բ)log7 (6x-1)=log7 (4x+9)=5

գ)logsqrt(10) (x+1)=lg(3x2 +9x+1)=0

դ)lg(x2 +2x-7)2 =2lg(x-1)=sqrt(41)-3/2

Հարցերի պատասխաններ՝

1)Պարզագույն լոգարիթմային հավասարում՝ logax=b

2)Եթե a-ն 1-ից տարբեր դրական թիվ է և u>0,ապա loga u=loga v հավասարությունը համարժեք է u=v հավասարությանը

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