Find the rule: 12, 0.4, 37.5%, 411514______ ，______ ．

Find the rule: 12, 0.4, 37.5%, 411514______ ，______ ．

(1) Because 5 + 1 = 6, 14 + 3 = 17, so should fill in: 617, (2) because 6 + 1 = 7, 17 + 3 = 20, so should fill in: 720 = 35%, so the answer is: 617, 35%

Let a be a real number, f (x) = a - (2 / (2 Λ x + 1)) (x ∈ R). If f (x) is an odd function, try to determine the value of A

Collar x = 0

Finding the integral of x ^ 2 / sqrt (x ^ 2 + 1 / 4)

x/2*sqrt（x^2+1/4)-1/8*ln（x+sqrt（x^2+1/4))+c

Fill in: 2.3.5.9

17
2*2-1=3
3*2-1=5
5*2-1=9
9*2-1=17

Let 1, 2, 3 It is known that the last 13 digits of the product are all exactly 0. May I ask: what is the minimum natural number that appears at the end of multiplication?

Only the multiplication of factor 2 and 5 can get a 0. If the last 13 bits of the product are all exactly 0, then at least 13 factor 2 and 13 factor 5 are needed. There are many factors in factor 2. To get 13 factors, 5, 5, 10, 15, 20, 30, 35, 40, 45, 55 each can get a factor 5, a total of 9, 25, 50 each can get

Like 1, 2, 3 Such numbers are called natural numbers. Numbers with a larger range than natural numbers are integers. What are numbers with a larger range than integers? Are there any numbers with a larger range?

Well, there's more
You'll understand when you go to high school
Now the largest range is the plural
Integer extensions are rational numbers, then irrational numbers, and finally complex numbers
But I'm too lazy to explain what they are. You may not understand them, and you will learn them in the future

Finding laws in mathematics 35, (), 21,14, (), 0

35,28,21,14,7,0

The product of four continuous natural numbers is 11880. What is the sum of these four numbers?

The quality factor of 11880 is: 11880 = 2 × 2 × 2 × 3 × 3 × 3 × 5 × 11; 3 × 3 = 92 × 5 = 102 × 2 × 3 = 12. These four natural numbers are 9, 10, 11, 12.9 + 10 + 11 + 12 = 42. A: the sum of these four numbers is 42

Given the function f (x) = x 2 + ax + 3, when x ∈ [- 2,2], f (x) ≥ A is constant, and the minimum value of a is obtained

Let the minimum value of F (x) on [- 2, 2] be g (a), then the minimum value of a satisfying g (a) ≥ A is obtained. The formula is f (x) = (x + A2) 2 + 3 − A24 (| x | ≤ 2) (1) when − 2 ≤− A2 ≤ 2, i.e. - 4 ≤ a ≤ 4, G (a) = 3 − A24, from the solution of 3-a24 ≥ a, ■ - 4 ≤ a ≤ 2; (2) when − A2 ≥ 2

Forwards I am heavy .Backwards I am not. What am I?
What's the meaning of this sentence? What's the answer?
Urgent, thank you!

Forwards I am heavy .Backwards I am not.What am
In front, I'm heavy. In the reverse, I'm not. What am I?
The answer is ton, because it's ton when you look down and not when you look back