Use a scientific calculator to work out the meaning of E + and E - after large numbers For example, the 45th power of 6 is 1.0394563753404887611151486631385e + 35 What does the 56th power of 0.2 mean by 7.2057594037927936e-40? How to convert e + and E - into normal numbers? Can you figure out how much, tens of thousands? Hundreds of thousands? Millions?

Use a scientific calculator to work out the meaning of E + and E - after large numbers For example, the 45th power of 6 is 1.0394563753404887611151486631385e + 35 What does the 56th power of 0.2 mean by 7.2057594037927936e-40? How to convert e + and E - into normal numbers? Can you figure out how much, tens of thousands? Hundreds of thousands? Millions?

This is scientific notation
E + 35 is the 35th power of 10
E-40 is the minus 40th power of 10
Scientific counting
E is followed by an exponent of 10
1.0394563753404887611151486631385e+35
=1.0394563753404887611151486631385*10^35
7.2057594037927936e-40
=7.2057594037927936*10^(-40)
7.2057594037927936e -40
It means 7.2057594037927936 * 10 ^ - 40 minus 40 power
2e3= 2* 10^3=2000
The number after e is the power of 10
Scientific counting
e=1.0394563753404887611151486631385e+35
=1.0394563753404887611151486631385*10^35
I'm a sophomore in high school
Represents the scientific counting method, originated from the computer assembly language.
For example:
E + 20 is the 20th power of 10
E-20 is the minus 20 power of 10
There will also be corresponding numbers in front of the scientific calculator, as long as they are multiplied by the following scientific counts
For example:
1.67e-15 is 1.67 times 10 to the negative 15th power
And the "1.0394563753404887611151486631385" you gave is just a precision... Expansion
Represents the scientific counting method, originated from the computer assembly language.
For example:
E + 20 is the 20th power of 10
E-20 is the minus 20 power of 10
There will also be corresponding numbers in front of the scientific calculator, as long as they are multiplied by the following scientific counts
For example:
1.67e-15 is 1.67 times 10 to the negative 15th power
However, the "1.0394563753404887611151486631385" you gave is only with high accuracy and many significant digits.
Of course, in the editing language, e can also be written
Given vector a = (x, - 2), B = (y, - 1), where x and y are all positive real numbers, if a is perpendicular to B, then t = x + 2Y, the minimum value is? Obtained
If a is perpendicular to B, then a * b = XY + 2 = 0
That is, xy = - 2
The title is wrong. XY should be greater than 0. Is it a = (x, 2) or B = (y, 1)
If it is, then XY-2 = 0, xy = 2
T = x + 2Y > = 2 radical 2XY = 2 * 2 = 4
That is, the minimum value is: 4
a=(x,-2),b=(y,-1)
ab=xy+2=0
We get xy = - 2
It doesn't match
Calculator on the use of M + m - can best give the following example
M + on ordinary calculator: first, click MC to clear m (scientific calculator is 0 sto m + or shift RCL m +). Then, calculate and press m + each time. For example, input 2 * 3, and then press m +; 3 * 4, M +; 4 * 5, M +; m - is the stored number minus the number in the display column, which is based on the original stored information
Linear equation of one variable
When solving the equation, someone accidentally pollutes a constant in the equation, and can't see clearly. The polluted equation is 2x-1 / 2 = 1 / 2x - *. Wang Qiang read the answer after the book, and the solution of this equation is x = - 5 / 3, so he quickly made up Changshu
If you add this constant?
Write out the process and figure out what the constant is?
*It's the contaminated constant
The constant is 3
Because x = - 5 / 3
So 2x (- 5 / 3) - 1 / 2 = 1 / 2x (- 5 / 3) - y
-10/3-1/2=-5/6-Y
Y=-5/6+10/3+1/2
Y=3
Substituting x = - 5 / 3 into 2x-1 / 2 = 1 / 2x - *
2 times (- 5 / 3) - 1 / 2 = 1 / 2 times (- 5 / 3)-*
-10/3- 1/2=-3/10-*
So the constant is 53 / 15
2x-1/2=1/2x-*
x=5/3
Substituting 1 * 5 / 3-1 / 2 = 1 / 2 * 5 / 3 -?
What's the solution? =-1/3
2x-1/2=1/2x-*
Substitute x = - 5 / 3 and get the solution*
*=x/2-2x+1/2
=3x/2+1/2
=(-5/3)(3/2)+1/2
=-5/2+1/2
=-2
The constant is - 2
Factorization 1, 8x ^ 2-22xy + 15y ^ 2 2, x ^ 3-8y ^ 3-x ^ 2-2xy-4y ^ 2 3, x ^ 4 + x ^ 2-2ax + 1-A ^ 2
So the original formula = (2x-3y) (4x-3y) (4x-5x-5y) 2.x (x-3-3y) (4x-5y) (4x-5y) 2 (x-3x-3y) (4x-3x-4x4x4x4x4x4x-4x4x4x4x-4x4x4x-5x4x4x4x4x4x-5x4x4x4x4x4x4x4x4x4x-5y) is the original formula = (2x-3y-3y) (4x-3y (4x-5y-5y (179; - 8y-8y \35\\\\\\\\\\\\\\\\\\\\\\inthis paper, we present a new method to solve this problem
1、8x^2-22xy+15y^2
=(4x-5y)(2x-3y)
2、x^3-8y^3-x^2-2xy-4y^2
=(x-1-2y)(x^2+2xy+4y^2)
3、x^4+x^2-2ax+1-a^2
=(a+x+1+x^2)(-a-x+1+x^2)
Given that the function f (x) = (the square of PX + 2) \ (q-3x) is odd, and f (2) = - (5 / 3), find the analytic expression of function f (2)
f(x)+f(-x)
=[px^2+2]/(q-3x)+[p(-x)^2+2]/(q+3x)
=2q (PX ^ 2 + 2) / (Q ^ 2-9x ^ 2) = 0 holds for any X,
∴q=0.
F (2) = (4P + 2) / (- 6) = - 5 / 3,
∴4p+2=10,p=2.
∴f(x)=(2x^2+2)/(-3x)=(-2/3)(x+1/x).
If the vector A.B is known to be uncoordinated and X (a + b) + y (2a-b) = a + 4b, then the value of real number x.y is
x(a+b)+y(2a-b)=xa+xb+2ay-yb=a(x+2y)+b(x-y)=a+4b
Vector a.b-incommensurate
x+2y=1
x-y=4
3y=-1
y=-1
X=3
The vector A.B is not a common line, and X (a + b) + y (2a-b) = a + 4B,
(X+2y)a+(x-y)b=a+4b,
x+2y=1,
x-y=4,
The results of solving the equation are as follows,
X=3,Y=-1.
How to use M + on ordinary calculator?
Such as the title
I mean: I have a lot of data, which need to be multiplied and added up by the computer. Can I use the M + key? How can I use it?
sure.
First, click MC to clear m (scientific calculator is 0 sto m + or shift RCL m +)
Then calculate, press m + once at a time
For example:
Then press m * 3 +;
3*4,M+；
4*5,M+；
……
Then press MR (RCL m +) to see the result (= 38)
5（x-5）+2（x-12）=0
4x+3=2（x-1）+1
Using a 12 cm diameter cylindrical lead column to cast 10 12 cm diameter shot, how long should be cut? (the volume of the ball is 4 / 3 π R 3) (3 is small 3)
5x-25+2x-24=0
7x=49
X=7
4x+3=2x-2+1
2x=-4
x=-2
The volume of shot put: 10 × 4 / 3 × π × 6 ^ 3 = 2880 π cubic centimeter
If a cylinder x cm is required, then
The second power of 6 is x π = 2880 π
36xπ=2880π
x=80cm
5x-25 + 2x-24 = 0 7x-49 = 0 x = 7 4x + 3 = 2x-2 + 1 2x + 4 = 0 x = - 2 the volume of 10 shot is 6 times π 10 times 4 / 3, that is 2880 π, the bottom area of the lead column is 6 times square π, that is 36 π, so the height of the lead column should be 2880 π divided by 36 π, and the height should be 80 cm
1、 5 (X-5) + 2 (X-12) = 0
5x-25+2x-24=0
7x=49
X=7
2、 4X + 3 = 2 (x-1) + 1
4x+3=2x-2+1
2x=-4
x=-2
3、 It has nothing to do with the volume of the ball. A lead column of 12x10 = 120 (CM) should be intercepted.
5x+2x=25+24
7x=49
X=7
2x=-4
x=-2
The volume of shot put: 10 × 4 / 3 × π × 6 ^ 3 = 2880 π cubic centimeter
Let 6 ^ 2x π = 2880 π if a cylinder x cm is needed
x=80cm
I wish you progress ~!
5（x-5）+2（x-12）=0
7X=49
X=7;
4x+3=2（x-1）+1
4X+3=2X-1
X=-2;
R = D / 2 = 6cm V ball = 10 * 4 / 3 π R 3 = 10 * 4 / 3 * π * 63 = 2880 π V column = π R2 * H = 2880 π H = 2880 / r2 = 80cm
5(x-5)+2(x-12)=0
5x-25+2x-24=0
7x=49
X=7
4x+3=2（x-1）+1
4x+3=2x-2+1
2x=-4
x=-2
The solution of the equation is 80cm
Factorization: 4x + 4xy-3y + 2x + 11y-6
4x^2+4xy-3y^2+2x+11y-6 =(2x-y)(2x+3y)+2x+11y-6 =(2x-y)(2x+3y)+3(2x+3y)-4x+2y-6 =(2x+3y)(2x-y+3)-2(2x-y+3) =(2x-y+3)(2x+3y-2)
Multiplication 2 - 1 3 2 3 - 2 with double cross phase result = (2x - y + 3) (2x + 3Y - 2)