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Number of columns 8,3,5,6,7,8,3,5,6,7. What is the number of 2012
2012 divided by 5 = 402 Two
The number of 2012 is 3
There is a column of numbers 1,2,3,5,8. Is the 100th odd or even
It's 1, 2, 3, 5, 8, 13, 21, 34, 55, 89
So starting with the second is an even number, two odd numbers
Three one cycle
The remainder of 100 △ 3 is the same as 4 △ 3
The fourth is odd
So 100 is odd
There is a column of numbers, 134 7 1 8 9 7 ·······························. What is the sum of these 2011 numbers?
(2010+1)*2010/2+2011=2023066
Calculate (3-1) ten (4-3) + (5-2) ten (7-5) + (20-9) ten (2 | 1 | 0) ten (24-1 | 2) =?
=2+1+3+2+11+11+13+23=76
The number of columns is - 1, 8 of 5, 15 of - 7, 24 of 9 The tenth item in this column is?
-1ˇn（2n+1）/n(n+2),
7/40
The number of one column was 1 / 3, - 3 / 8, 5 / 15, - 7 / 24, 9 / 35 (1) What's the tenth number? (2) What's the 100th number? What's the nth number?
Three aspects,
First: sign, according to the law of positive and negative alternation
Second: molecules grow in odd numbers
Third: the denominator is the square - 1 of (serial number + 1)
So the number 10 is - 19 / 120,
The 100th number is - 199 / 10200,
The nth number is (- 1) ^ (n + 1) * (2n-1) / (n + 1) ^ 2-1
The first line 1, the second line 3 2, the third line 4 5 6, the fourth line 10 9 8 7?
One
Thirty-two
Four hundred and fifty-six
ten thousand nine hundred and eighty-seven
one billion one hundred and twelve million one hundred and thirty-one thousand four hundred and fifteen
A (n + 1) = n (n + 1) / 2 + (1,2,3... + N + 1) n + 1 is odd
A (n + 1) = (n + 1) (n + 2) / 2 + (0, - 1, - 2, - 3...) n + 1 is even
10(10+1)/2-2 =53
The first line is 4328; the second line is 8.567; the third line is 31.24; the fourth line is 549 What is the question mark in the fourth line?
4 * 8 = 32
8 * 7 = 56
3 * 4 = 12
5 * 9 = 45
So fill in 5
Natural numbers are listed in the following table according to certain rules. What is the fifth number in row 10? The first line: 1, the second line, 2, 3, the third row, 4, 5, 6, and the fourth row, 7, 8, 9, 10
1 + 2 + 3 + 4 +... + 9 = 45, the last number in line 9
So the fifth number in line 10 is 50 (45 + 5)
Natural numbers are listed in the following table according to certain rules. What is the fifth number in row 10? The first row 1, the second line 2 3, the third line 4 5 6, the fourth line 7 8 9 10
The first number in the tenth line: 1 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 46
The first five numbers in the tenth line are 46, 47, 48, 49, 50
The fifth number in line 10 is 50
RELATED INFORMATIONS
- 1. The first line: 1, the second line: - 2,3, the third line: - 4,5, - 6, the fourth line: 7, - 8,9, - 10.. what is the fifth line in the tenth line? The first line: 1, the second line: - 2,3, the third line: - 4,5, - 6, the fourth line: 7, - 8,9, - 10.. what is the fifth line in the tenth line?
- 2. Observe the number of columns: 1,2, - 3, - 4,5,6, - 7, - 8, ····. What are the numbers of 2005 and 2008? Observe the number of columns: 1,2, - 3, - 4,5,6, - 7, - 8, ····. What are the numbers of 2005 and 2008?
- 3. Find the law: 0, - 1, + 4, - 5, + 8, - 9, + 12, - 13 What is the number 2010? …… Write the process of calculating the answer
- 4. The number of regular columns: 2, 5, 9, 14, 20, 27 The 2011 number in this column is______ .
- 5. There is a column of numbers, arranged according to a certain rule into 1, - 3,9, - 27,81, - 243, etc., where the sum of some three adjacent numbers is - 1701. What are the three numbers? The first is x, the second is x, and the third is X All three solutions are required, and all solutions are required
- 6. If you look at the number in the following order, you can find out what rule it may be arranged according to which rule you can write three numbers immediately Root number 2, 2, root number 6, root number 2, root number 10___ ,___ ,___ ,.,___ (nth number)
- 7. Please write down the 99th and 100th numbers in this column Are - 201.2% and - 2.25% in this column? If yes, please indicate their respective numbers? If not, please give reasons If the number of this column is infinite, which number is getting closer and closer?
- 8. The number of columns arranged according to a certain rule is 1 2，2，9 2，8，25 2，18… Then the nth number is___ .
- 9. There is a column of 3 / 2, - 5 / 6, 7 / 12, - 9 / 20, 11 / 30, - 13 / 42 Apply the above rule to calculate the sum of the first 100 numbers
- 10. Observe the number of a row arranged in order to explore its change law -1,1/2,-3,1/4,-5,1/6,-7,1/8,... (1) Write down the next three numbers: (2) What are the numbers of 2014 and 2015?
- 11. Observe the arrangement of the following numbers carefully and fill in the numbers on the horizontal line (1)：1,2,4,7,11,16,____ ,____ . (2):2, 5, 10, 17, 26,_____ , _____ . (3):0, 3, 8, 15, 24, _____ , _____ .
- 12. Observe the number of each column below. Fill in the appropriate number on the horizontal line according to certain rules, and explain your reasons. Two eighths, three sixteenth, thirty Observe the number of each column below, fill in the appropriate number on the line according to certain rules, and explain your reasons Two eighties, three sixteenth, four thirty-two, five sixties
- 13. If the number of a column arranged according to a certain rule is 1 / 2, 1 / 3, 1 / 10, 1 / 15, 1 / 26, then the ninth number should be --------?
- 14. 2 - 48 - 16 32. What is the nth number?
- 15. According to a certain rule, the number 1, - 3,9, - 27,81, - 243,. The nth number can be expressed as___ . Don't use the (n-1) power of - 3, which doesn't make sense. The (1-1) power of - 3 is equal to - 3
- 16. Find the law: 1, 1, 2, 3, 5, 8 What's the eighth number
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