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Find out the law of the following sequence and fill in the blanks, 13.9.11.6.9.3,
seven
3,5,7,9,11,13,15…… How many terms are there in this sequence?
n
Sequence, find the law
1/2,2/5,4/17,5/26,6/37……
Write the expression of the nth number
Easy n / N squared + 1
Find the law of the lower sequence
3968,63,8,3
What's the next number
2 is the square of the last number minus 1 to get the first number
RELATED INFORMATIONS
- 1. Find the law according to the sequence 1. Root 2, - root 3, root 2, root 5, - root 6, root 7 Observe the sequence and say a rule of arrangement
- 2. Find the rules 2, 5, 14, 38 Find the next number I thought it was 104, but two to five was wrong I didn't work out the others. Please know the writing rules! What's a on the first floor
- 3. What is the number 2002 of the sequence 3,48,1,5,49,4,7,50,7,9,51,10,11
- 4. Find a series of numbers 1.3.4.7.11.18.29. What is the remainder of the number 2002 divided by 6
- 5. Sequence 1.2.3.4.2012 how many zeros are there in the 2012 numbers
- 6. 9,18,14,41,33114,98 what's next?
- 7. Observe the following three lines: - 3, 9, - 27, 81, - 243 -5，7，-29，79，-245，… -1，3，-9，27，-81… (1) What is the order of the first row? (2) What is the relationship between the number of the second and third rows and the number of the first row? (3) Take the 10th number of the three rows and calculate the sum of the three numbers
- 8. A simple algorithm for calculating 99.. 9 (88) x99.9 (88) + 199.9 (88) to solve the problem of grade 4 in primary school
- 9. 1/(1/20+1/21+1/22+1/23+...+1/38+1/39) What's the integral part of?
- 10. 243, 81, 27, (), (), what are the rules No three and nine! no The wrong number is 243. There are no 3 and 9 ahead
- 11. What sequence is 4.6.8.9.10
- 12. Carefully observe the arrangement rules of the sequence of numbers, and choose the one you think is correct to make it conform to the arrangement rules of the original sequence of numbers: 6, 7, 8, 13, 15, 21, (), 36 A27 B28 C31
- 13. If the first number is 3, the second number is 5, the third number is 7, and the fourth number is 9, then what is the nth number? Use the algebraic expression
- 14. If the values of algebraic formula 12-3 (9-y) and algebraic formula 5 (y-4) are equal, then y = 0___ ．
- 15. The law of 0, - 3, - 9, - 15, - 21
- 16. -8, - 3,3,10,18, [], [] find the rule and fill in the number
- 17. 1 2 3 4 5 6 7 8 9 only + or - is allowed. How to get 100? It can be seen as: 12, 23, etc
- 18. 100 + 123 two?
- 19. What is 1000 out of 100
- 20. Solve the equation (1) twenty fifth x = 1.2:75 (2) 1.5:4.5 = x: 60 (3) x + 60% x = 48 (4) (1-50%) x = 2.5