1, 3, 2, 6, 4, (), (), 12 ()·····

9 8 16
The odd sequence is equal ratio sequence with common ratio 2, and the even sequence is equal difference sequence with tolerance 3

RELATED INFORMATIONS

1. 1/2=1/1*2=1/1-1/2,1/6=1/2*3=1/2-1/3,1/12=1/3*4=1/3-1/4. Calculate 1 / (X-2) (x-3) - 2 / (x-1) (x-3) + 1 / (x-1) (X-2)
2. Fill in the number according to the law. (1 point) & nbsp; & nbsp; 1, 3, 2, 6, 4______ ，______ ，12，16，…
3. 1/3+1/6+1/12+1/24+…… +1/3*2^n-1+…… = ditto
4. What's the rule of 2 / 3,1,3 / 2,9 / 4
5. What is the law of 1 + 2 = 3 and 4 + 3 + 2 + 1 + 1?
6. -1 * (1 / 2) = - 1 + (1 / 2), - (1 / 2) + (1 / 3) = - (1 / 2) + (1 / 3), - (1 / 3) * (1 / 4) = - (1 / 3) + (1 / 4) (1) Rule: () is expressed by a formula containing N, where n is a positive integer (2) Use the above rule to calculate: (- 1 * (1 / 2)) + (- (1 / 2) * (1 / 3)) + (- (1 / 3) * (1 / 4)) +. + (- (1 / 2012) * (1 / 2013)) ask for the answer!
7. (1 + 1) × 1 / 2 = 1, (1 + 1) × 2 / 2, (1 + 3) × 3 / 2, (1 + 4) × 4 / 2?
8. Summary rule: 1 / N (n + 1)=________ Using this law, we can calculate: half + one sixth + one twelfth + one twentieth + one thirtieth
9. From 11 × 2 = 12, 11-12 = 12; 12 × 3 = 16, 12-13 = 16; 13 × 4 = 112, 13-14 = 112 The conclusion is: 1n (n + 1)=______ Using this law, we can know that 11 × 2 + 12 × 3 + +1n(n+1)=______ ．
10. 1, - 2,3, - 4?
11. What's the fastest formula from 1 10 2 10 3 to 100
12. How much is it from 1 to 100? What's the formula?
13. The formula from 1 to 100. Why (1 + 100) × (100 △ 2) be more detailed
14. 1 to 100 formula
15. When n is 2, we get 1. When n is 3, we get 3. When n is 4, we get 6. When n is 5, we get 10
16. What is the result of 1 * 2 * 3 * 4 * 5 * (n-1) * n? Is there a formula I think so too
17. The simplified formula of 1 + 2 + 3 + 4 + 5 + 6 +. + n
18. 1+2 +3+4+…… +The formula of n
19. Given the sequence an = [1 / a (n-1)] + 2, A1 = 2, find the general term formula of the sequence
20. Given A1 = 1, a (n + 1) / a (n) = 1 / 2 in the sequence, find the general term formula of the sequence