Giải các phương trình sau:

d) log₃(x² – 3x + 2) = log₃(2x – 4).

From the monitoring of earthquake waves it is evidence that the Earth’s outer core is liquid, whereas the inner core is solid.

I tried to convince him several times but I failed because he was unwilling to consider what I have said.

Giải các phương trình sau:

c) lnx + ln(x – 1) = ln4x;

Not until the office phoned me had I found out about the meeting.

Hardly had we arrived at the hotel, that there was a power cut.

All applications ask for your address, telephone number and the title of the job for whom you are applying.

When I got to the cinema Jack had been waiting for me.

Giải các phương trình sau:

a) log(x + 1) = 2;

Most of the guests turned up two hours early, that took us by surprise.

Giải các phương trình sau:

d) 5^x = 3^{2x – 1}.

A lot of ancient paintings and sculptures can be found in this museum but there are a few works of Hugo because he is relatively unknown in this country.

Medical research indicates that large amount of histamine can be responsible for colds, hay fever, and other respiratory reactions.

A schedule of the day’s events can obtain at the front desk.

Giải các phương trình sau:

c)  $\sqrt{3}{e}^{3x}=1$;

Because the high risk of the fire during the drought, the officials ordered that no outside fire of any sort could be set.

Tim is different from John in that the first is smart and the latter rather unintelligent.

Had I been interested in that subject, I would try to learn more about it.

You needn’t give me any more advices because, from now on, I can cope with it on my own.

Giải các phương trình sau:

b)  ${100}^{2x^2-3}=0,1^{2x^2-18}$;

She wishes we didn't send her the candy yesterday because she's on a diet

I’d like to see him in my office the moment he will arrive.

Your brother spoke in a more interesting way, even though he mentioned less details.

Whoever said this he must have been a liar because it is something that even a child knows to be true.

Giải các phương trình sau:

a) 3^{x – 1} = 27;

b) Ở độ cao trên 10 km thì áp suất khí quyển sẽ như thế nào?

We should also take into account a fact that unemployment causes poverty.

The remains of Homo erectus, an extinct species of early man, was first discovered on the island of Java by Dutch physician Eugene Debois.

Áp suất khí quyển p (tính bằng kilôpascan, viết tắt là kPa) ở độ cao h (so với mực nước biển, tính bằng km) được tính theo công thức sau:

 $\ln \left(\frac{p}{100}\right)=-\frac{h}{7}$.

(Theo britannica.com)

a) Tính áp suất khí quyển ở độ cao 4 km.

Prior to an extermination programe early in the last century, alive wolves roamed across nearly all of North America.

Killer whales tend to wander in family clusters that hunt,play and resting together.

Giải các bất phương trình sau:  

b) 2log(2x + 1) > 3.

I was discouraged to swim when I put my feet in the ice-cold water.

I was in disguise when I met them ; as the result, of course they didn’t recognise me.

Giải các bất phương trình sau:

a)  ${\log }_{\frac{1}{7}}\left(x+1\right)>{\log }_7\left(2-x\right)$;

It is generally believed that high level of carbon emissions lead to climate change.

We have postponed to tell anyone the news until after Christmas.

During the school year, I am not allowed to watch television when I have finished my homewok.

Many of the population in the rural areas is composed of manual labors.