General term formula of sequence 2.5.2.5
3.5+(-1)^n×1.5
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- 1. 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?
- 2. -1、8/5、-17/5、24/9、-35/11、48/13…… What is the tenth term in the sequence?
- 3. 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?
- 4. Observe a column number, 3, 8, 15, 24, 35, 48 And so on, what is the smallest integer larger than 2010 in this series?
- 5. Observe the number of columns 3, 8, 15, 24, 35, 48 By analogy, the smallest integer larger than 2014 in this sequence is
- 6. Observe the sequence of numbers: 1, 3, 6, 10, 15, 21... According to the sequence of numbers in this column, what is the nth number?
- 7. 1, - 3,5, - 7,9, - 11... In this sequence, if the nth number is a, what is the nth + 1 number?
- 8. Write the general term formula of sequence 1 / 2,1 / 4, - 5 / 8,13 / 16, - 29 / 32,61 / 64
- 9. Mathematical problems: write the general formula of this sequence: 1 / 2,1 / 4, - 5 / 8,13 / 16, - 29 / 32,61 / 64
- 10. Sequence 1 / 2, 1 / 4, - 5 / 8, 13 / 16, - 29 / 32, 61 / 64
- 11. 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?
- 12. Write a general formula of the following sequence: 1, 0, - 13, 0, 15, 0, - 17, 0
- 13. 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,
- 14. 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,..
- 15. Observation - what is the nth number of 1,2,7,14,23,34 rule
- 16. Observe the numbers - 1, 2, 7, 14, 23, 34 According to this law, the nth number is______ .
- 17. Observation sequence - 2, - 1,2,7,14,23 According to this rule, what is the nth number?
- 18. Observe the sequence and complete it: 1, 3, 8, 22, 60, (), 48
- 19. Sequence problems 3,5,22,42,83, ()
- 20. Urgent, there is a sequence, 4.10.16.22... 52. How many items are there in this sequence