1.01×9.9

1.01×9.9

1.01×9.9
=（1+0.01）X9.9
=1X9.9+0.01X9.9
=9.9+0.099
=9.999
This can be explained by the law of multiplicative distribution
I don't know if it's right. I hope it's helpful to you. I wish you study better and better! Come on!

Using logarithmic derivative method to find the derivative of function, y = x ^ (x ^ x), how to find is not the standard answer

Y = x ^ (x ^ x), LNY = ln [x ^ (x ^ x)], LNY = x ^ xlnx, ln (LNY) = ln [x ^ x (LNX)]. Ln (LNY) = xlnx + ln (LNX), using the implicit function derivation method, (1 / LNY) (1 / y) (dy / DX) = LNX + X / x + (1 / LNX) * (1 / x), (dy / DX) * / (y * LNY) = 1 / (xlnx) + LNX + 1,... Dy / DX = [1 / (xlnx) + LNX + 1] * ylny. = [

A-b-c = 19, the square of a + the square of B + the square of C = 91, find the value of BC CA ab

(a-b-c)^2=a^2-2a(b+c)+(b+c)^2=a^2+b^2+c^2+2(bc-ca-ab)=19^2=361
bc-ca-ab=(361-91)/2=135

What is the definition of special relativity mass?

Special relativity is a physical theory which combines mechanics and electromagnetism based on the basic concepts of time and space. It was founded by A. Einstein in 1905. This theory shows an important difference from the classical physical theory when it deals with the phenomenon of high-speed motion

2X + 1-3x + 7-3x + 5
How much is it

(2X^2)+1-3X+7-(3X^2)+5
=(2X^2)-(3X^2)-3X+1+7+5
=(-X^2)-3X+13
^2 means square

A rectangle with a circumference of 12 decimeters can be divided into three identical squares. What is the area of each square?
Please answer the formula and the answer. Thank you

12 / 2 = 6 (CM) 6 / 4 = 1.5 (CM) 1.5 * 1.5 = 2.25 (cm2)

60π rad/min=?rad/s

60π rad/min=60π÷60 rad/s=π rad/s

3x + 1.5 * 1.2 = 16.8

3x+1.5*1.2=16.8
3x=16.8-1.8
3x=15
x=5

The circumference of a rectangle is 24 cm. If the length of the rectangle decreases by 1 cm and the width increases by 2 cm, it becomes a square. What is the area of the square
（）

Let length x width y
2*(X+Y)=24
X-1=Y+2
solve equations
X=15/2
Y=9/2
Square side length 15 / 2-1 = 13 / 2
Square area (13 / 2) &# 178; = 169 / 4

In variable speed motion, the average speed describes the average speed of the object in motion, and its value is equal to

In variable speed motion, average speed describes the average speed of an object moving at a constant speed, which is equal to distance divided by time