Sequence 1 / 2, 1 / 6, 1 / 12, 1 / 20, 1 / 30, 1 / 42 The general formula of is Such as the title
An = 1 / [n (n + 1)] (n is a positive integer)
RELATED INFORMATIONS
- 1. 0,2,6,12,20,30,42 constitute a sequence to find the general term formula
- 2. What is the general term formula of sequence 1 212 216 11664?
- 3. A general term formula for sequence 13 + 2,13 + 6,13 + 12,13 + 20,13 + 30?
- 4. The general formula of 1-1. - 1-1?
- 5. How to find the general formula of 1, - 1,1, - 1 Isn't this a swing sequence? Why is the answer a long string of 1 / 2 + - 1 to the power of N + 1
- 6. What is the general formula of 1, - 1,1, - 1
- 7. 1, - 3,1, - 3 general term formula
- 8. In mathematics, there is a series called Fibonacci series: 0 1 2 3 5 8 13 21 34 55 89 144 These sequences, the number 0, the second number 1, from the third number, each number is exactly the sum of the first two values. String number, how much is the remainder of the 2014 number divided by 3
- 9. The famous Fibonacci sequence: 1,1,2,3,5,8,13,21,34,55... If you carefully observe the sequence, what is the 11th number? What is the rule?
- 10. 1. 2, 3, 5, 8, 13, 21, 34, 55, 89, 144. These are interesting Fibo Series in numbers The most important feature of secondary number is (to describe it in one's own language)
- 11. Find the sequence 121212121212 The general term formula of
- 12. 7+12+17+22+27+.+5n+2=
- 13. Known sequence √ 2, √ 7. √ 12, √ 17 Then its general term formula is --, 2 √ 13 is the --
- 14. General formula - 1 / 3,3 / 5, - 5 / 9,7 / 17
- 15. The general formula of 2,7,12,17? Thank you for your help
- 16. Sequence 1 / 5, 2 / 8, 4 / 11, 8 / 14 A formula of
- 17. 0,2,5,9,14. The expression of the nth number It is easy to see from the sequence that the sequence is + 2; + 3; + 4; + 5 But how can I not find the general formula? want
- 18. Find the expression of sequence 1,4,8,13,19 I don't understand. Please explain clearly
- 19. What's the rule of 2,4,7,11,16? Please use n to express the general term formula
- 20. General term formula of sequence 2 4 8 14?