Cube of (- 2) × (- 3) square

Cube of (- 2) × (- 3) square

Cube of (- 2) × (- 3) square
=-8×9
=-72

Proof: in any 5 natural numbers, there must be 3 numbers, and their sum is a multiple of 3
To be clear

If at least three of the five random natural numbers are in the same drawer, then the three numbers are divided by 3 to get the same remainder R, so their sum must be a multiple of 3

When measuring the resistance value of resistance R1 by voltammetry, the ammeter uses external connection method. It is known that the reading of voltmeter is 20V, the reading of ammeter is 0.4A, and the internal resistance of voltmeter is 2.0 × 10 third power Ω, then the measured value of resistance R to be measured is - Ω, and its real value is - Ω

When measuring the resistance value of resistance R1 by voltammetry, the ammeter uses external connection method. It is known that the reading of voltmeter is 20V, the reading of ammeter is 0.4A, and the internal resistance of voltmeter is 2.0 × 10 third power Ω, then the measured value of resistance R to be measured is 50 Ω, and its real value is 51.28 Ω
The second blank can also be filled in 2000 / 39

If the equation (X & # 178; + Y & # 178; - 1) = 16, then x & # 178; + Y & # 178; = what

This ha, equal to 16 + 1 for 17? Is the topic not quite right

How much K is one ohm in a multimeter

Ohm and K are two different units and cannot be compared
Ohm is the unit of resistance, K is the unit of quantity
I guess you want to ask, how many K ohms is one ohm
1 ohm = 0.001k ohm

Solution equation: 1, (x-1) &# 178; = 2 (1-x) 2, (x-1) &# 178; + (x-1) - 6 = 0

1：(x-1)^2=2(1-x)
(1-x)^2-2(1-x)=0
(1-x)(1-x-2)=0
x=1,x=-1
………
2: (x-1) ^ 2 x (x-1) - 6 = 0
Consider X-1 as a whole
(x-1-3) (x-1 + 2) = 0
(x-4) (x + 1) = 0
x=4,x=-1

The daily electricity consumption of an ordinary refrigerator is 0.8 yuan, and the electricity charge is 0.5 yuan per kilowatt hour. How much is the daily electricity charge of an ordinary refrigerator
Why 0.392

Why 0.392
5 = 1. 6 degree

Calculation: (1) (a-2b + C) (a + 2b-c) - (a + 2B + C) 2; (2) (x + y) 4 (X-Y) 4; (3) (a + B + C) (A2 + B2 + C2 AB AC BC)

(1) (2) the original formula = [(x + y) (X-Y) (X-Y) (X-Y) 4 = [(x + y) (X-Y) (X-Y) (X-Y) (X-Y) (X-Y) 4 = [(x + y) (X-Y) (X-Y) 4 = (x2-y22) 4 = (x2-2) 4 = [(x + y) (X-Y) (X-Y) 4 = (x2-y22) 4 = 8 + Y8 + 6x4y4-4x6y4-4x6y24-4x6y2-4x6y2-4x6y22-4x6y22-4x6y2-4x6y2-4x6y2-4x66y2-4x6y2-4x6y22-4x6y2-4x6y2-4x6y2-4x6y2-4x6y6; (3; (3; (3) (3) the original formula = A3; (3; (3); (3) (3) (3) the original formula = A3 (3); (3 A3 + B3 + c3-3abc

The table lamp for lathe marked with 36V 15W and household electric lamp marked with pz220 -- 15 work normally for 1 hour, and the consumed electric energy ()
A is as much as B, the latter is more than C, and the former is more than D

Pz220 -- 15 means the rated voltage is 220 V and the rated power is 15 W. if the power of the two lamps is the same, then the power consumed for one hour of normal operation is the same (a)

8.8 * (4 / 11 + 0.625) simple calculation (important process)

Original formula = 8.8 × 4 / 11 + 8.8 × 0.625
=3.2+5.5
=8.7