Is y = - x ^ 3 an increasing or decreasing function Don't be too thin

Is y = - x ^ 3 an increasing or decreasing function Don't be too thin

Y = - x ^ 3 is
Decreasing function

Why is y = - x ^ 3 a decreasing function on R

First of all, the reciprocal of Y
Is - 3x ^ 2 always less than 0, so it is a decreasing function

1/3x+1/4x+2.8=x

1/3x+1/4x+2.8=x
x-1/3x-1/4x=2.8
x-4/12x-3/12x=2.8
5/12x=14/5
x=14/5x12/5
x=168/25

Minus 10 2 / 7 times 9 5 / 7
Calculation by formula

=-)10+2/7)×(10-2/7)
=-(10²-2²/7²)
=-（100-4/49）
=-99 45 / 49

What is 10 out of 9 times 3 out of 5

10 out of 9 times 3 out of 5
=Two out of three

24 × 2 / 5 + 75 △ 2.5 + 0.4 simple calculation!

24×2/5+75÷2.5+0.4
=24×2/5+75÷5/2+2/5
=24×2/5+75×2/5+2/5
=(24+75+1)×2/5
=100×2/5
=40

What is the definition of quadratic function

In general, we call a function of the form y = ax ^ 2 + BX + C (where a, B, C are constants, a ≠ 0) quadratic function. In this formula, we call a quadratic coefficient, B is the coefficient of the first term, C is the constant term. X is the independent variable, y is the dependent variable
[[not clear, ask again; satisfied, please accept! Good luck to you!]]

Can you change 8, 888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888?

( 88888888 - 888888 )÷( 8888888 - 88888 )×( 8888 - 888 )÷( 88 - 8 ) = 88000000 ÷ 8800000×8000÷80 = 10×100 = 1000

Let R be the complete set, a = {x | x ＞ 1}, B = {x | ax + 9 ＜ 0}, and (CRA) ∩ B = / 0 to find the value range of real number a

(CRA) ∩ B = / 0

Simple calculation of 79 × 101 of 100

79 / 100 × 101
=79/100x(100+1)
=79/100x100+79/100x1
=79+79/100
=79 and 79 / 100