How accurate is the approximate number 3300? Better be sure!

How accurate is the approximate number 3300? Better be sure!

Hundred
First of all, 3300
The number of digits corresponding to the last digit after the decimal point is the value

How accurate is the approximate number of 2004 000

Decile

How many are the significant numbers of approximate number 0.004320?
I said 4, my mother didn't believe it. By the way, why = 3 = thank you~

The significant number is the first non-zero number from the left
If 0.012345, there are five
If 0.078 and 0.78 have nothing to do with the decimal point, they are two places. 506 and 220 are three places
So 0.004320 is four significant digits
You're right

There are six different primes written on the six cards. The sum of three fractions composed of six primes is a / 1001. A is a natural number. What is the minimum of a

1001 = 7 * 11 * 13, so the denominators are 7, 11 and 13 respectively, so a is the smallest, so the molecules are the smallest prime 2, 3 and 5 respectively. So a / 1001 = 2 / 7 + 3 / 11 + 5 / 13 = 994 / 1001, so a = 994

N ≥ 3, n ∈ n, it is proved that the N-1 power of 3 is more than 2N-1

Baidu binomial theorem,
3^n=(1+2)^n>1+n*(n-1)>2n-1
Mathematical induction, for n = K + 1,
3^k>3*(2k-1)>2(k+1)-1

Decimal natural numbers can be written as polynomials of decreasing power of 2, such as: 19 (10) = 16 + 2 + 1 = 1 × 24 + 0 × 23 + 0 × 22 + 1 × 21 + 1 × 20 = 10011 (2), that is, decimal number 19 corresponds to binary number 10011. According to the above rules, decimal number 413 corresponds to binary number 10011______ ．

413 = 256 + 128 + 16 + 8 + 4 + 1, = 1 × 28 + 1 × 27 + 0 × 26 + 0 × 25 + 1 × 24 + 1 × 23 + 1 × 22 + 0 × 21 + 1 × 20, = 110011101 (2)

Any natural number can be written as a polynomial of decreasing power of 2
For example, 3 = 2 1 power + 2 0 power, 5 = 2 square + 2 0 power, 8 = 2 3 power, 15 = 2 3 power + 2 2 2 power + 2 1 power + 2, please do me a favor. I really appreciate it, but I dare not forget your kindness

28 = 2^4 + 2^3 + 2^0
35 = 2^5 + 2^1 + 2^0
The sign ^ denotes the power

Use enumeration to represent the set of natural numbers greater than 3 and less than 10

{4,5,6,7,8,9}

Use enumeration to represent the set of natural numbers less than 5

{0、1、2、3、4}

Use enumeration to represent the set of natural numbers less than 5

{1},{2},{3},{4},{1,2},{1,3},{1,4},{2,3},{2,4},{3,4},{1,2,3},{1,2,4},{2,3,4},{1,2,3,4}
I hope I can help you