Observation - what is the nth number of 1,2,7,14,23,34 rule
N^2 - 2
RELATED INFORMATIONS
- 1. Find the rule and write the general formula of each sequence * 3 1,2/3,1/2,2/5,1/3,( ),1/4,... 3/2,1,5/8,3/8,7/32,... 1,3,7,15,31,..
- 2. Observe the characteristics of the following sequence, fill in the blanks with appropriate numbers, and write a general formula for each sequence 1.( ),-4,9,( ),25,( ),49 1, radical 2, (), 2, radical 5, (), radical 7 ------------------ How to write this,
- 3. Write a general formula of the following sequence: 1, 0, - 13, 0, 15, 0, - 17, 0
- 4. 5,0,5,0,5, what is the general formula of this series? What is the general term formula of 5,0,5,0,5,0?
- 5. General term formula of sequence 2.5.2.5
- 6. Give a sequence how to quickly know its general formula, is there a rule I feel that it needs more feeling than painting color, that is, to make up the number. Although it can be made, it always takes some time. Why?
- 7. -1、8/5、-17/5、24/9、-35/11、48/13…… What is the tenth term in the sequence?
- 8. The number of one column is - (1), 8 / 5, - (15 / 7), 24 / 9, - (35 / 11), 48 / 13 What is the twentieth term in this sequence?
- 9. Observe a column number, 3, 8, 15, 24, 35, 48 And so on, what is the smallest integer larger than 2010 in this series?
- 10. Observe the number of columns 3, 8, 15, 24, 35, 48 By analogy, the smallest integer larger than 2014 in this sequence is
- 11. Observe the numbers - 1, 2, 7, 14, 23, 34 According to this law, the nth number is______ .
- 12. Observation sequence - 2, - 1,2,7,14,23 According to this rule, what is the nth number?
- 13. Observe the sequence and complete it: 1, 3, 8, 22, 60, (), 48
- 14. Sequence problems 3,5,22,42,83, ()
- 15. Urgent, there is a sequence, 4.10.16.22... 52. How many items are there in this sequence
- 16. The sum of the first term and the fourth term of an arithmetic sequence is equal to 10, while the difference between the second term and the third term is equal to 2?
- 17. What is the law of filling in the blanks in the sequence problem? The first sequence is 16,27,16, (), 1 The second sequence 6,8,28,36, () The third 8,9,34129, ()
- 18. 2,0,3,2,6,6, () what number should be filled in the brackets to conform to the law of the previous sequence?
- 19. Please fill in a number in the brackets of the following sequence to make it meet the law and explain it! 88、87、()、335、3220 I don't know the answer Please help me It's reasonable!
- 20. Observe the following sequence, find out the rule, and fill in the appropriate number in brackets according to the rule 1,1,3,15,( ),945,( ).