What is the arithmetic root of 1

What is the arithmetic root of 1

The arithmetic root of 1 is 1
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If 2a-18 = 0, then the arithmetic root of a is?

First, according to 2a-18 = 0, find out a = 9, and the square root of 9 is positive and negative 3. This question is about the arithmetic square root, so it is positive 3

Given: X & sup2; - 6x = 9 - √ (y + 4) - √ (Z + 5), find the arithmetic square root of XYZ

I think the title is wrong. It should be X & # 178; - 6x = - 9 - √ (y + 4) - √ (Z + 5)
The results show that: (x-3) &# 178; + √ (y + 4) + √ (Z + 5) = 0
So x = 3, y = - 4, z = - 5, so XYZ = 60, √ XYZ = 2 √ 15

() = 9: () = () / 20 = 3 * () = () 12 = 0.75

(3 / 4) = 9: (12) = (15) / 20 = 3 * (1 / 4) = (12 / 16) = 0.75

If the system of quadratic equations {2x-y = m, x + NY = - 3 has innumerable solutions, then M=_____ ,n=_______

When the coefficients of X and y are the same, and their sum is the same, the original equation system has no array
The original equations {2x-y = m, x + NY = - 3}
The coefficients of X are reduced to the same {2x-y = m, 2x + 2ny = - 6}
That is {M = - 6,2n = - 1}
The solution is {M = - 6, n = - 1 / 2}
In this case, the original equations are {2x-y = - 6, x + - Y / 2 = - 3}
Then M=___ -6__ ,n=__ -1/2_____

Simple calculation of 19 + 199 + 1999 + 19999 ······ + 1999 ···· 99 (2002 9)

19 + 199 + 1999 + 19999 ······ + 1999 ···· 99 (9 in 2002)
=20-1 + 200-1 + 2000-1 +. + 20000.. 0 (2002 0) - 1
=2222.22 (2003-2002)
=2222.222220220 (total of 2003)

It is known that the fiftieth power of 2 minus 4 can be divided by two integers between 60 and 70, and these two integers can be solved

2^50-4
=4(2^48-1)
=4(2^24+1)(2^12+1)(2^6+1)(2^6-1)
=4(2^24+1)(2^12+1)×65×63
These two numbers are 63 and 65
Tips: using the square difference formula. Qsmm method is right. If it's complicated, it's much simpler to extract 4 first

（101+103+… +199）-（90+92+… +188）=______ ．

Solution 1: 101 + 103 + +199）-（90+92+… +188) = (101 + 199) × [(199-101) △ 2 + 1] / 2 - (90 + 188) × [(188-90) △ 2 + 1] / 2, = 300 × 50 △ 2-278 × 50 △ 2, = (300-278) × 25, = 22 × 25, = 550 +199）-（9...

The side view of a cylinder is a square. If the height of the cylinder is shortened by 2 cm, the surface area will be reduced by 12.56 square cm, and the volume of the cylinder will be calculated

The side expansion of a cylinder is a square, so the circumference of the bottom of the cylinder is equal to the height. The height of the cylinder is shortened by 2cm, and the surface area is reduced by 12.56cm2. In fact, it only reduces the side area. According to: the side area of the cylinder = the circumference of the bottom × the height, we can calculate the circumference of the bottom of the cylinder: 12.56

Solution equation: 2 (x ^ 2 + 1 / x ^ 2) - 9 (x + 1 / x) + 14 = 0 (hint: let x + 1 / x = t)

2(x²+2+1/x²)-9(x+1/x)+10=0
2(x+1/x)²-9(x+1/x)+10=0
Let x + 1 / x = t
The original equation can be reduced to
2t²-9t+10=0
(2t-5)(t-2)=0
∴t=5/2 t=2
∴x+1/x=5/2 x+1/x=2
∴x=2 x=1/2 x=1