Calculate the scores such as A1, A2, A3. If A2 > A3, calculate the average of A1 and A2. If A2 > A3, calculate the average of A1 and A2

Calculate the scores such as A1, A2, A3. If A2 > A3, calculate the average of A1 and A2. If A2 > A3, calculate the average of A1 and A2

=if(a2>a3,average(a1,a2),average(a1,a3))
perhaps
=average(a1,max(a2,a3))

A solution to elliptic equation
1 9
-----+ - - = 1 solves B ^ 2
1+b^2 4b^2
thank you

12 hectares is equal to several parts of a square kilometer, 743 milliliters is equal to several parts of a liter

12 hectares = 0.12 square kilometers = 3 / 25 square kilometers (/ is a fractional line)
743 ml = 743 / 1000 L

It is known that when x belongs to R, the function y = f (x) satisfies f (2.1 + x) = f (1.1 + x) + 1 / 3, and f (1) = 1, then the value of F (100) is

For all positive integers n, let x = n-1.1, then f (2.1 + n-1.1) = f (1.1 + n-1.1) + 1 / 3
That is, f (n + 1) = f (n) + 1 / 3
That is, {f (n)} is an arithmetic sequence, and f (1) = 1, tolerance d = 1 / 3
So f (100) = 1 + (100-1) * 1 / 3 = 34

How to solve the equation x (x * x * x-4x * x-4x + 15) + 18 = 0

x^4-4x^3-4x^2+15x+18=0x^4-3x^3-x^3+3x^2-7x^2+21x-6x+18=0(x-3)(x^3-x^2-7x-6)=0x1=3x2=3.49449283705542x3=-1.24724641852771-0.40170103640146ix4=-1.24724641852771+0.40170103640146i

Find tan10 ° * tan50 ° * tan60 ° * tan70 ° and the answer is 1. It's a process

∵sin10°sin50°sin60°sin70°＝（√3/2）sin10°（sin50°sin70°）＝（√3/4）sin10°（cos20°－cos120°）＝（√3/4）sin10°［cos20°－cos（180°－60°）］＝（√3/4）sin10°（cos20°＋cos60°）＝（√3/...

What is average acceleration and instantaneous acceleration

The ratio of the change of velocity in a period of time to this period of time is the average acceleration in this period, a (bar) = Δ V / Δ T. the instantaneous acceleration is the average acceleration when this period of time tends to zero, that is, the derivative of velocity to time, a = Lim (Δ T) Δ V / Δ t = DV / dt

Granny Wang's family has chickens and rabbits. If we know that there are 13 more chickens and 146 feet than rabbits, how many chickens and rabbits are there

There were x rabbits and X + 13 chickens
4X+2（X+13）=146
X=20
20+13=33
There were 33 chickens and 20 rabbits

Tan α = 135, what degree is α

α=arc tan 135
=89.575594580638524656677829016193.°
≈89.5756°
=89°34.536‘
=89°34‘32.14“

5x square - 2X-4 = 0

5x square - 2X-4 = 0
Divide both sides of the equation by 5: xsquare-2x / 5-4 / 5 = 0
Xsquare - 2x / 5 + 1 / 25-1 / 25-4 / 5 = 0
(x-1 / 5) square-21 / 25 = 0
Then X-1 / 5 = the square root of plus or minus 21 / 25
X=0.2±.0917
X = 1.117 or -0.717