1 to 100 formula
(1+100)x100÷2=5050
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- 1. The formula from 1 to 100. Why (1 + 100) × (100 △ 2) be more detailed
- 2. How much is it from 1 to 100? What's the formula?
- 3. What's the fastest formula from 1 10 2 10 3 to 100
- 4. 1, 3, 2, 6, 4, (), (), 12 ()·····
- 5. 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)
- 6. Fill in the number according to the law. (1 point) & nbsp; & nbsp; 1, 3, 2, 6, 4______ ,______ ,12,16,…
- 7. 1/3+1/6+1/12+1/24+…… +1/3*2^n-1+…… = ditto
- 8. What's the rule of 2 / 3,1,3 / 2,9 / 4
- 9. What is the law of 1 + 2 = 3 and 4 + 3 + 2 + 1 + 1?
- 10. -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!
- 11. 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
- 12. What is the result of 1 * 2 * 3 * 4 * 5 * (n-1) * n? Is there a formula I think so too
- 13. The simplified formula of 1 + 2 + 3 + 4 + 5 + 6 +. + n
- 14. 1+2 +3+4+…… +The formula of n
- 15. Given the sequence an = [1 / a (n-1)] + 2, A1 = 2, find the general term formula of the sequence
- 16. Given A1 = 1, a (n + 1) / a (n) = 1 / 2 in the sequence, find the general term formula of the sequence
- 17. What is the sum of 1 to 100?
- 18. 1 to 100 = 5050, how much is 1 multiplied by 100? If there is a simple algorithm, please write it by the way (simple algorithm takes precedence) Oh, my God
- 19. What is the law of one plus one plus two plus one hundred? I know I said it in the previous paper, but I forgot that I couldn't find it, Why divide by two?
- 20. If the sum of the first n terms of a sequence an is Sn = a ^ n-1 (a ≠ 0), then what is the characteristic of the sequence? What is the sequence? And prove it It's the nth power of a minus 1 Is it possible to be an arithmetic sequence?