1.2.7.15.31.63. What are the rules of this group of numbers Wrong, it's 1.3.7.15.31.63.
The nth power of 2-1
127 after
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- 1. 1 3 7 15 31 63. How to express rules with letters
- 2. What should be in the brackets 0, - 1, 3, - 7, (), - 31, 63, - 127?
- 3. 1,3,7,15,31,63,127…… What is n
- 4. 1 2 / 3 3 / 7 4 / 15 5 / 31
- 5. Fill in the number according to the rule: 1, 3, 7, 15, 31______ ,______ .
- 6. Find the rule 3, 7, 15, 31, 63___ ,255
- 7. 0, 1, - 3, 7, - 15, 31. What is the 100th number
- 8. 77×13+255×999+510.
- 9. 77×13+255×999+510.
- 10. 77*13+225*999+510
- 11. Find the rule: 1,3,7,15, (), 63127.1,1,2,3,5,8,13,21, (), ()
- 12. 1,3,7,15,31,63, (), () to find the law
- 13. 15×15=?25×25=?35×35=? 15×15=〔1×(1+1)〕×100+25=225 25X25=〔2X(2+1)〕X100+25=625 35X35=〔3X(3+1)〕X100+25=1225
- 14. I have values of 0, 7.5, 10, 12.5, 15, 17.5, 20, 25, 27.5, 30, 32.5, 35, 40, 45, 50. I want to repeat the combination between them, and 1000 These combination elements can be up to 50, the minimum can be 1. Thank you!
- 15. 15+20+25+30+35+40+45.+1000=?
- 16. When 1 / 2 * (1000 / 435 + X / 1000) - 1 = 0.05/0.15/0.25/0.35, the values of X are respectively? Note: X is rounded
- 17. Define new operation; known; # satisfy 4 # 1 = 15,5 # 4 = 11,8 # 6 = 48, then; 10 # 9=(
- 18. If we know x + y = 5, then x + y + 6 = 5 + 6 = 11; if we know x + y + 6 = 15, then x + y = 5, the above operations reflect the overall idea, we can regard x + y as Given a + B = a, ab = a + 2011, 1-2 (a + AB) + (ab-2b) = 3A, you can determine the value of a + B and AB, if you can find the value
- 19. If x + y = 5 is known, then x + y + 6 = 5 + 6 = 11; if x + y + 6 = 15 is known, then x + y = 9. In the above operations, the whole idea is reflected, and here x + y can be used As a whole Given that the square of 2x + 3x = 5, then the square of 2x + 3x + 1= (2) Given that the square of x-2x-5 = 0, then the square of 2x-4x-5= (3) Given a + B = 3, ab = - 2, find the value of - 2 (a + AB) + (ab-2b) + 1
- 20. Given that point a (3x-6,4y + 15) and point B (5Y, x) are symmetric about the X axis, what is the value of X + y?