Give a formula any formula is fine, just right, but don t mention something meaningless

The approximate relationship between pi and the natural logarithmic base: can sum pi.

e linked to the primary.

Formulas are very rare in the mathematical world, and they are national treasure-level formulas in the kingdom of mathematics. In addition to the big names.

Ding's Euler formula, I'm afraid this formula is more famous. The form of this formula is abnormal.

It's a pity that it's just an approximate formula. So it's ninth. Although it is an approximate male.

formula, but the degree of approximation is quite high, and there are seven significant figures that are the same, that is, two.

The difference is within 1 in 10 million. You can try it with the calculator on your computer.

Chin Formula: Those who are familiar with the method of calculating pi should be familiar with this formula. This formula.

The magic of the is that it expresses pi as the sum of the arctangents of two fractions. Take advantage of the complex.

The exponential expression of the number can prove this equation directly. It was the first in history to be used for fast.

The formula for calculating pi because the value of the arctangent function in the above equation can be forced by the Taylor series.

Near. I really don't know, if Zu Chongzhi knew about this method of calculating pi, he would bury his head in the calculation and calculate it to a small amount.

Count a few hundred digits.

John. One of Bernoulli's formulas (just legend has it that he discovered): this magical formula is legendary.

It was John Bernoulli who discovered it. I don't need to talk about the magic of the formula, continuity and discreteness.

The relationship is vividly expressed. If you think your calculus level is not bad, yes.

To challenge this already has.

Years of history formula, see if you can prove it. I.

The results were proven in ten minutes.

The vertex formula of the function is used, because the maximum value of the quadratic function is at the vertex.

Vertex formula: (-b 2a, (4ac-b 2) 4a).

Generally applicable.

a, b, c in proportional series, then b 2=ac .

It's a proportional series.

s2=a1(1-q^2)/(1-q)

s4=a1(1-q^4)/(1-q)

s6=a1(1-q^6)/(1-q)

s4-s2=[a1(1-q^2)/(1-q)]*q^2=s1*q^2

s6-s4=[a1(1-q 2) (1-q)]*q 4=s1*q 4=> (s4-s2) s2=(s6-s4) (s4-s2)=q 2, i.e., s2, s4-s2, s6-s4 into a proportional sequence with a common ratio of q 2.

1、t=v/g=10/10=1

2. The displacement of the first bang thrown to the apex = 1 2gt 2 = 5 and the displacement of the lower call = 5 + 15 = 20

The lower chain fall displacement = 1 2gt 2, and the solution t = 2

Whole time = 1-2 = 3

Let the sum of the series be sn=a+aq+aq 2+.aq^(n-1)

Multiply both sides by q to get qsn=aq+aq 2+aq 3....aq^n

Subtract the two formulas to obtain sn-qsn=a+aq+aq 2+.aq^(n-1)-(aq+aq^2+aq^3...aq^n)

1-q)sn=a[1+q+q^2+..q^(n-1)-q-q^2-..q^(n-1)-q^n]

a(1-q^n)

So sn=a(1-q n) (1-q).

Solution: Set daffodils x plants. Equation: 3x+10=79 x=23 Answer: There are 23 daffodils.