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Regularly arrange the number of a column: 1, - 2,3, - 4,5, - 6,7, - 8, expressed by the algebraic formula with n
The N-1 power of (- 1) × n
RELATED INFORMATIONS
- 1. -2 4 - 8 16 - 32 this group of numbers in what order? With the algebraic expression containing N, thank you
- 2. Observe the law of the following numbers and fill in the blanks: 0,3,8,15,24 ··, then what is its 2005 number? What is the nth number?
- 3. Observe the rules and fill in the blanks: one plus one half, two plus one fourth, three plus one eighth The fifth number is, and the nth number is
- 4. If we observe the law of 1:2,12:4,13:8, then the fifth number is () and the nth number is ()
- 5. Find the sum of 1, negative 2,. 3, negative 4,5, negative 6,7, negative 8.99, negative 100 integers, and calculate the formula
- 6. Find the sum of 1, negative 2,. 3, negative 4,5, negative 6,7, negative 8.99 and negative 100
- 7. 1 + 2-3-4 + 5 + 6-7-8 + 9 + 10. It is a continuous integer starting from 1. Take two positive and two negative in turn. What is the sum of the first 2006 numbers in this series
- 8. If 1 + 2-3 + 4-5 + 6-7 + 8-9 + , is the sum of the first 2000 numbers written down by taking two positive and two negative integers from 1 What is the sum of the first 2000 numbers? Why?
- 9. 1 + 2-3-4 + 5 + 6-7-8 +. Take two positive and two negative integers from 1. What is the sum of the first 2006 numbers?
- 10. 1 + 2-3-4 + 5 + 6-7-8 + 9 + 10-11-12. It is a continuous integer starting from 1. You can find the algebraic sum of 2008 numbers by taking two integers and two negatives in turn
- 11. According to this arrangement, the nth number is represented by an algebraic expression
- 12. What is the sixth pair of numbers (1,2), (4,6), (7,10) arranged according to the following rules
- 13. 1/2008+2/2008-3/2008-4/2008+5/2008+6/2008-7/2008-8/2008+9/2008+、、、、、、+2005/2008+2006/2008
- 14. What is the rule 2 + 8 = 15 1 + 3 = 06 4 + 6 = ()
- 15. Find the rule, -- 1.1/2, -- 1 / 3,1 / 4, -- 1 / 5,1 / 6?
- 16. 1-2+3-4+5-6+… +2007-2008+2009．
- 17. Compare 1 / 2 ^ 2 + 1 / 3 ^ 2 + 1 / 4 ^ 2 +. + 1 / 2008 ^ 2 + 1 / 2009 ^ 2 with 1
- 18. A series of numbers in regular order: 1, 3, 7, 13, 21, 31 What's the number in 2008? It's better to have a formula
- 19. 1 ^ 4 x 2 ^ 4 + 3 ^ 4 x Ten 2007 ^ 4 ten 2008 ^ 4 ten 2009 ^ 4
- 20. As shown in the figure, one triangle needs three sticks, two sticks need five sticks, three sticks need seven sticks, ten sticks need n sticks need how many sticks