Decimal fraction negative integer natural number 0 in chronological order

Decimal fraction negative integer natural number 0 in chronological order

In remote times, a tribe would go hunting every day, one, two, three So there are natural numbers
Then one day, without hitting a head, there was 0
The game should be divided. At first, you and I are the whole game, so it's an integer
As a result, once the score was not enough, the leader said, Zhang San, you owe today's share first. So there were negative numbers and positive numbers
Zhang San quit, so the leader had to say, Li Si, give him half of your score
Li Si quit, and the leader had no choice but to say, let's each take a small piece and give it to Zhang San

Natural number integer positive number fraction negative number decimal number is how to produce each with a sentence overview

In remote times, a tribe would go hunting every day, one, two, three So there is a natural number. The game you hit has to be divided. At first, it's all you and me. It's a complete game, so it's an integer. As a result, once the score was not enough, the leader said, Zhang San, you owe today's share first. So

Hook three strands, four strings, five, what's the angle

Remember that the smaller angle is theta
From the definition of trigonometric function
sinθ=3/5,cosθ=4/5,tanθ=3/4
So θ = arcsin3 / 5 = arccos4 / 5 = arctan3 / 4
It's about 37 degrees, less than a little

Ammeter voltmeter small bulb resistance about how much

Different specifications (models) of ammeter, voltmeter and small bulb resistance is not the same
Generally speaking, the internal resistance of ammeter is about 10 to 100 ohm; the internal resistance of voltmeter is about 1000 to thousands of ohm, or even higher; the resistance of small bulb is about 1 to 20 ohm

The equation of 8x-x = 56

8x-x=56
7x=56
x=56÷7
x=8

In the circuit as shown in figure a, the power supply voltage remains unchanged. When the switch S is closed and the slide P of the sliding rheostat moves from end B to end a, the relationship between the voltage at both ends of the resistance R1 and the current passing through the resistance R1 is measured as shown in Figure B The control variable reasoning shows that the power consumption of R1 decreases when slide P slides to the right

(1) It can be seen from the figure that when p is at a end, the power supply voltage is applied to R1, so: u power supply = 12V; (2) when p is at a end: R1 = u1i1 = 12v1.5a = 8 Ω; when p is at B end: R total = u power supply I2 = 12v0.5a = 24 Ω, the maximum resistance of sliding rheostat is: R2 = R total - RL = 24 Ω - 8 Ω = 16 Ω; (3) when p is at a end

F (x) > = x, f (x) > = (1-x), it is proved that f (1 / 2) > 1 / 2

I don't know if you've written it wrong. It should be proved that f (x) > = 1 / 2, because f (x) > = x, f (x) > = (1-x) we know that f (x) > = max {x, 1-x} Max {x, 1-x} is the larger function of y = x and y = 1-x. it's easy to know that Max {x, 1-x} = 1-x, x = 1 / 2 let g (x) = max {x, 1-x} G '(x) = - 1, x = 1 / 2, so g (x) = max {x, 1 -

There are two light bulbs of 220 V 40 W and 220 V 60 W respectively. Connect them in series with the 380 V power supply. Which one is brighter? Which one uses more current?

The two bulbs of 220 V 40 W and 220 V 60 W are connected in series on the 380 V power supply. Because they are connected in series, the current is the same. The resistance of 40 W bulb is greater than that of 60 W bulb. The terminal voltage of 40 W bulb is higher, so 40 w bulb is brighter than 60 W bulb

125 * 103-375 simple operation urgent ah ah ah ah ah

125*103-375=125*（100+3）-375=12500+375-375=12500

Is there any difference between electric motor 800W and 500W

There's a difference. 800W is stronger than 500W because it's powerful. I'll add that 800W runs as fast as 500W