(0.25)^8=[(0.5)^2]^8=(0.5)^16
(0.125)^4=[(0.5)^3]^4=(0.5)^12
(0,25)8=[(0,5)2]8=(0,5)2.8=(0,5)16
(0,125)4=[(0,5)3]4=(0,5)3.4=(0,5)12
Viết các số sau đây dưới dạng các lũy thừa của cơ số 0.5
a) (0.25)^8
b) (0.125)^4
viết cac số( 0.25)8 va (0.125)4 dưới dạng các lũy thừa của co số 0.5
I. Read the following passage and decide if it is T or F.
Many people still believe that natural resources will never be used up. Actually, the world’s energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnharm of the New England Institude of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the only alternative.
However, many people do not approve of using nuclear power because it’s very dangerous. What would happen if there was a serious nuclear accident? Radioactivity causes cancer and may badly affect the future generations.
The most effective thing is that we should use natural resources as economical as possible.
Statements | T/ F |
1. Natural resources will run out. 2. The world’s energy resources are unlimited. 3. We know exactly how much fuel is left. 4. We should use fuel economically. 5. According to Professor Marvin Burnham, nuclear power will be used as a substitute for natural resources. 6. Many people disagree to use nuclear power as an alternative energy. 7. Radioactivity from nuclear power causes cancer and may have bad effect on the future generations. 8. Natural resources should be used as economical as possible. | 1…… 2…… 3…… 4…… 5……
6…… 7……
8……
|
Tính tổng S=1+0.5+0.25+0.125+0.0625+0.03125+... .
Tính tổng S=1+0.5+0.25+0.125+0.0625+0.03125+... .
Jane draws a circle and a triangle on each page of her booklet, and near each drawing she writes the number of common points of the circle and the triangle.
How many different numbers can she write
rewrite into the form of power of base
512/125
rewrite into the form of power of base
512/125
rewrite into the form of power of base
512/125
