Urgent help! I need a 5-second countdown PPT opening video! Who can provide it to me?

Who can send me a 5-second countdown video at the beginning of PPT? It's urgently needed!

Solution: (x-b)/a=2-(x-a)/b

x/a-b/a=2-x/b a/b

x/a x/b=2 a/b b/a

(1/a 1/b)x=2 a/b b/a

When 1/a 1/b≠0, the solution of the equation is:

x=(2 a/b b/a)/(1/a 1/b)

Let us learn about the method of solving the puzzle. The specific calculation formula is: x=〔(2ab a^2 b^2)/ab]/〔(a b)/ab]. I hope the above method can help players who have not passed the level yet.

In order to help readers who have not yet answered this question, I will explain the specific meaning of this expression. This expression can be simplified to x=[(a b)^2/ab]/[(a b)/ab]. Hope this explanation helps everyone.

x=a b

At this time the equation has a unique solution.

When 1/a 1/b=0, (a b)/ab=0,

With a b=0, the equation is

(a b)x/ab=(a b)^2x/ab

0x=0

No matter what value x takes, 0x=0 always holds, which means that this equation has countless solutions.

So when a b≠0 and neither a nor b is equal to 0

That is, when a b≠0 and ab≠0, the equation has a unique solution, and the solution is x=a b

How to set up dynamic countdown animation in powerpoint

1. Open PPT-2007 and select "New Slide".

2. Select: "Insert"--"Picture"--Select a background image.

3. After selecting the background image, select "Text Box" to add the number 3 (to create the countdown effect of 3.2.1).

4. Select the text box and select "Animation"--"Custom Animation".

5. Click "Add Effect" on the right.

6. Select "Enter"--"Wheel" in sequence.

7. The wheel rendering is as follows.

8. Continue to add effects, select "Exit"--"Disappear", and start selecting "After", as shown in the figure.

9. Select number 3, enlarge it appropriately and copy it twice, then change the numbers to 2 and 1, and arrange them overlappingly. As shown in the picture.

10. Set the parameters of numbers 2 and 1 to be consistent with 3, and select "After" for all "Start" items, as shown in the figure.

11. After everything is set up, you can play the magic preview. Finish.

It’s urgent to add a countdown flash animation like second animation to ppt!

The "countdown" in PPT can be realized using "custom animation". Here is a simple countdown animation of "5-4-3-2-1-GO".

1. Add word art. To add 6, 5, 4, 3, 2, 1, and GO are each a separate artistic word.

2. Set custom animation.

Select "5", right-click, and customize animation.

For the word art "5", set a "gradient zoom" entry animation, and change the speed to "fast", because the fast time is exactly one second.

Give the artistic word "5" another time and set a "disappear" exit animation. Note that the start time of the animation here should be selected as "after" (the start time of gradient zoom is "before"). After setting, it will look like the picture below.

Set the same animation for each word art. Note that one is "before" and the other is "after". The set appearance is as shown below. Note that the word art "GO" does not exit the animation.

(Of course, if you find it troublesome to do it one by one, you can select all the word art and set a custom animation together, and then adjust the order and change the start time.)

Finally, click the "Top Align" and "Left Align" buttons. The purpose of this is to make these word arts overlap together. Then adjust it to the appropriate position.

Click to play!

How to set the countdown time on PPT

1. Open PPT, select "Insert" - "Shape" - "Circle" (hold down the shift key while drawing a circle).

2. Set the fill background color and border of the drawn circle (select the circle, right-click and select "Format Shape", or directly use the "Fill" and "Outline" functions to set it.), and then fill in the circle number.

3. Set animation, select the drawn shape (combine circles and numbers) - select animation - add animation - select the entry animation as "appear" - select the exit animation as "disappear". Then set the "Start" option to "After Previous Animation" and the delay time to 0.5 seconds.

4. Then copy the drawn shape, paste 4 identical circles (their animation properties are also copied and pasted at the same time), and change the numbers in the circles to 4, 3, 2, and 1.

5. Set the format of five numbers. Select the five shapes and select "Center Left and Right" and "Center Top and Bottom" under "Format" - "Alignment".

6. After completing the above steps, the five shapes are "combined into one", and then select the play button to view the dynamic countdown effect from 5-1.

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