Ask a few more questions today Thank you, thank you, help answer a few questions, thank you.

1 This question is permutated and combined, 1) choose 2 people out of 3 people, there are (3*2) (2*1) = 3 combinations The answer is 3 times.

2) Choose 2 out of 10 people, there are (10*9) (2*1)=45 combinations The answer is 45 times.

2.From the question, it can be seen that 1 256=1*(1 256); 1/128=2*（1/256）；1/64=4*（1/256）；1/32=8*（1/256）；1/16=16*（1/256）；1/8=32*（1/256）；1/4=64*（1/256）；1/2=128*（1/256）；

So the common factor (1 256) can be extracted when adding

So get the original formula = (1 256) * (1 + 2 + 4 + 8 + 16 + 32 + 64 + 128).

3.It's the same as the second question.

But a new approach is recommended.

Sum of proportional sequences.

The two problems can be solved by equations, but they are quite complicated, and if you need to solve them, you can send me a message.

1) 3 times. 2) 55 times (n people are (1+2+3+...)+n) times) i.e. 1-1 128).

That is, (729-1) 729).

I will ...... the details

1. PowerPoint views include normal view, notes page view, slide browsing view, slide show view, slide master, handout template, and note template.

2. Set the filling effect of the background in PowerPoint with gradients, textures, patterns, and more.

3. In PowerPoint, when printing a presentation, the printed content includes slides, handouts, remarks pages, and slide outlines.

4. In PowerPoint, when printing a presentation by handout, the number of slides per page is allowed to select 4 6 8

1.Gaze - (gaze) hesitate - (froze) deliberately - (look deeply).

2.The shoemaker respectfully placed the old military shoes on the top floor of the counter.

3.At this time, the shoemaker may think: What a great public security officer, for the good of the people, he has no right to wear shoes in this life, and he remembers to give me money for shoe repair, what a noble quality!

4.I think that tall public security officers are not afraid of danger for the interests of the people, and the spirit of brave fighting is the most precious in the world, because of this spirit, we have such a peaceful and comfortable life, we can stay away from danger, and their efforts have brought us a happy life.

5."After saying that, he strode away"Add a full stop after it (I see that the original text above is not, so I want to add it here).

Sorry.,I don't understand the first question.,The last two are written by feeling.,I think there's a sense of hesitation to be stunned.,Careful and deliberate also have the meaning of careful.。 So I wrote it. (Hope someone can give you a satisfactory answer).

(reason: the first equal sign is equal because the parallel lines are at the same angle, the second equal sign is equal because the middle line of the isosceles triangle bisects the corresponding angles, and the third equal sign is equal because the wrong angles within the parallel lines are equal).

I've done this before, so let's copy it directly.

56 divided by seven eighths equals 64