-1、8/5、-17/5、24/9、-35/11、48/13…… What is the tenth term in the sequence?

If the third quantity - 17 / 5 is - 15 / 7, the tenth quantity is - 99 / 19

RELATED INFORMATIONS

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