If the rational numbers a and B satisfy (a + 2) √ 2 = B-3, then a ∧ B A ∧ B is the power B of A

If the rational numbers a and B satisfy (a + 2) √ 2 = B-3, then a ∧ B A ∧ B is the power B of A

a+2=n√2
a=n√2-2
2n=b-3
b=2n+3
A ^ B = (n √ 2-2) ^ (2n + 3) (where n is a rational number)
When a is a rational number, n = 0
a=-2,b=3
a^b=-8

It is known that a and B are rational numbers and that a is not equal to the reduced 2 / 1 of B (a = B - | a-b)|
Divide 1,2,3.100 natural numbers into 50 groups with two numbers in each group. Now record any one of the two numbers in each group as a, and the other as · B, and substitute it into 2 / 1 (a + B - | A-B |). Calculate the result. After substituting 50 groups, 50 values can be obtained, and the minimum sum of these 50 values can be obtained

When a > b, 1 / 2 (a + B - | A-B |) = 1 / 2 (a + B-A + b) = B
When a

One gram of alcohol burns completely and releases 3 * 10 ^ 4 joules of heat. What's its calorific value
Such as the title

001kg, q = 3 * 10
The seventh power J / kg of q = q / M = 3 * 10

1. Build a cylindrical pool, the perimeter of the bottom is 25.12 meters, and the depth is 2 meters. Cement should be applied on the bottom and around it. If 10 kg cement is used per square meter, how many kg of cement is needed? If water is injected into the pool, and each cubic meter of water weighs 1 ton, how many tons of water can be injected into the pool at most?
2. A cylindrical measuring barrel with a bottom radius of 5cm. After a piece of iron sheet is taken out of the measuring barrel, the water surface drops by 3cm. What is the volume of this piece of iron?
3. Saw a 1.5-meter cylindrical iron bar into four small cylinders. The surface is 24 square centimeters more than the original. What is the volume of this iron bar?

My God, I'm in grade six, too!
1.25.12 * 2 + (25.12 / 3.14 / 2) 2 (square) * 3.14 * 10 = 1004.8 (kg)
(25.12 / 3.14 / 2) 2 (square of) 2 * 1 = 100.48 (ton)
2.5 (square of) * 3.14 * 3 = 235.5 (square centimeter)
3.1.5m = 150cm 24 / 6 * 150 = 600 (cm3)

(), () can be converted into electric energy, and electric energy can also be converted into (), () energy

Move, heat
Heat, move

According to factorization, 2.37 * 52.5 + 0.63 * 52.5-2 * 52.5 are calculated

2.37*52.5+0.63*52.5-2*52.5
=52.5（2.37+0.63-2）
=52.5*1
=52.5

How many grams is 2 jin?

One kilogram equals two kilos. One kilogram equals 500 grams. Two kilos equals 1000 grams

Find the number of (2-1) (2 + 1) (2 & # 178; + 1) (the fourth power of 2 + 1)... (2 + 1) + 1

The original formula = [(2-1) (2 + 1) (2 ^ 2 + 1) (2 ^ 4 + 1)] * (2 ^ 2 + 1) (2 + 1) (2-1) + 1 = (2 ^ 2-1) (2 ^ 2 + 1) (2 ^ 4 + 1) (2 ^ 2-1) + 1 = (2 ^ 4-1) (2 ^ 4-1) + 1 = (2 ^ 4-1) ^ 2 * (2 ^ 4 + 1) + 12 ^ 4 = 16, so 2 ^ 4-1 = 15, 2 ^ 4 + 1 = 17, so the number of its single digits is 5 * 7 + 1 = 6

As shown in the figure, R1 = 4 Ω, R2 = 8 Ω, when connected to the power supply, the indication of the voltmeter is 2V, how much is the total electric power consumed by the circuit?

Two resistors are connected in series, the voltage at both ends of R1 is measured by voltmeter, the current in the circuit: I = u1r1 = 2v4 Ω = 0.5A, the total electric power consumed by the circuit: P = I2 (R1 + R2) = (0.5A) 2 × (4 Ω + 8 Ω) = 3W. A: the total electric power consumed by the circuit is 3W

"The number of projections of one vector in another vector direction"
Can the quantity in this sentence only be positive? Or both? Does the quantity have a direction?
Thank you~

The projection quantity of a vector in another direction is a number, which can be positive, negative, and of course zero