Computer prawns to help!! 10

Here are a few things to keep in mind when purchasing:

1. Choose a well-known brand.

It is best to be an international brand, and the quality of their products is ***, because they are not willing to affect their brand image because of a small market.

2. Try to choose a mobile processor.

The processor is quite the brain of a laptop, and is the most important chip in a laptop, especially the processor will also have a battery management function to extend the life of the battery.

4 hard disk is preferably 5400 rpm.

The speed of the mainstream laptop hard disk is 5400 rpm, and many low-cost laptops are still 4200 rpm, the faster the speed of the hard disk, the better the overall effect of the laptop, and you can check the model of the laptop hard disk when purchasing, so that you can know the speed of the laptop.

5. LCD screen carefully inspected.

The quality of today's LCD screen panels is generally good, so there is not much difference in brightness, color and sharpness. However, many users tend to only notice the size of the LCD screen, but some signs that are crucial to the display effect. If the viewing angle, contrast, response time, etc. are not enough, special attention should be paid to when purchasing, usually the specifications of the LCD and the actual image quality do not have much to do with it, so if you want to pick a good LCD screen, it is best to see it.

6. Pay attention to the battery.

If the laptop has no battery, the convenience of use will be greatly reduced, as far as the laptop battery is concerned, lithium batteries are now generally used, and they can be charged repeatedly without compromising the performance of the battery, generally speaking, the notebook (regardless of size) provides at least 2 hours of battery life, of course, the longer the better.

7. The workmanship should not be too rough.

Rough workmanship can be said to be a common problem of low-cost computers, many users often only pay attention to the performance of the computer when buying a notebook, but ignore the workmanship, and in fact, the workmanship of the notebook is also a very important link, when choosing, look at the gloss, try the feel, I believe you will make the right choice.

8. The practical value of the included software.

When you buy, look at what software you have sent, but the most important thing is the operating system, ask whether it is a genuine operating system, there may be many laptops that are pirated software installed by dealers, which will bring unnecessary trouble to your after-sales service in the future.

Correct you a problem.

ASUS and BENQ are Chinese brands! More than 70% of the world's computers are produced in China, Lenovo acquired the IBMPC department, and the ideapad is so good, Acer computer sales in Europe are the first, and ASUS motherboards are the first in the world, why look down on domestic technology!?

Sony has a VGN-CR322H that comes in several colors. The performance is good and can meet your requirements. But the Vista system must be installed, the XP can be changed, but the driver is more difficult to find.

Pepsi multi-core king second generation.

b=1/2；3/2。

two f(x) decreases monotonically on (- 3);

f(x) increases monotonically on (-3; f(x) decreases monotonically on (,+;

1/2，a）

3 a = 0, f (x) min = 0

Four-2 = f(x) = 9

a∈(-3、g(a)max=0;

g(a)min=-5