Move only one match to make the following formula true 1＋7－13＝44

Move only one match to make the following formula true 1＋7－13＝44

Take the + of 1 + 7 here to the 1 of - 13
It's like this:
117-73=44
This is the case

7-11 = 4 how to move a matchstick?

If you move one of the equals sign to the minus sign, it will become 7 = 11-4. The formula holds

How much is 2 times x times x times 3x?

2x^2*3x=6x^3

29 out of 30 times 30 is equal to? Simple calculation

29 out of 30 times 30 = 29

Given that a > 0, a [1] = a, a [n + 1] = a + 1 / a [n], the limit of the sequence exists and is greater than 0, find the limit

Let the limit of sequence be a
a[n+1]=a+1/a[n]
Limit both sides
A=a+1/A
Then we find the value of positive a

There are 1, 2, 5 and 10 yuan banknotes in 1080 yuan. The number of each banknote is equal. How many yuan are there in each banknote?

1080÷（1+2+5+10）
=1080÷18
=60 sheets
One yuan is 60x1 = 60 yuan
2 yuan is 60x2 = 120 yuan
5 yuan is 60x5 = 300 yuan
10 yuan is 60x10 = 600 yuan

Of the 12 out of 7, 27 out of 17, 36 out of 19 and 54 out of 29, the largest is

I just answered --
9 out of 5, 12 out of 7, 27 out of 17, 36 out of 19, 54 out of 29
Separate into decimals
1.8 1.71 1.59 1.89 1.86
So the biggest is 36 out of 19

It is proved by mathematical induction that 2 ∧ n > n ∧ 2 holds when n is a natural number no less than 5

1. When n = 5, 2 ^ 5 = 32 > 25 = 5 ^ 22, if n = k, where k ≥ 5, 2 ^ k > k ^ 2 holds, then when n = K + 1, there is 2 ^ (K + 1) = 2 × 2 ^ k > 2 × K ^ 2, because 2 × K ^ 2 - (K + 1) ^ 2 = k ^ 2-2k-1 = (k-1) ^ 2-2 ≥ (5-1) ^ 2-2 = 14 > 0, so 2 × K ^ 2 > (K + 1) ^ 2, that is, 2 ^ (K + 1) > (K + 1) ^ 2 holds. 3, it can be inferred that

X ^ 2ln (x + √ (1 + x ^ 2)) for definite integral from - 1 to 1

This function is odd, so the definite integral is 0

What is the law of 7.19.37?
What is the sixth digit of 7.19.37

7=2^3-1^3=(1+1)^3-1^3
19=3^3-2^3=(2+1)^3-2^3
37=4^3-3^3=(3+1)^3-3^3
...
The nth item is (n + 1) ^ 3-N ^ 3
Item 6 is (6 + 1) ^ 3-6 ^ 3 = 127