Find the rule: 1, 4, 13, 40, 121? I want to write an algebraic expression
N = the first power of 1 + 3 + the second power of 3 + all the way up to the (n-1) power of 3
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- 1. What is the law between the numbers 9, 1, 4, 3, 40121
- 2. 15% of a number is 40, and 1 / 4 of it is 60 ()
- 3. Find the rules 6,13,27,49, (), 121, (). How to fill in the brackets?
- 4. 13,27,49,( ),121,( ).
- 5. What is the law between 6.13.27.49. (). 121. ()
- 6. Find the rule: 5 11 23 47 () 191 () 5 13 37 109 () () 6 13 27 49 () 121 () There's another group There were four groups as follows 5 11 23 47 ( )191 ( ) 5 13 37 109 ( ) ( ) 6 13 27 49 ( )121 ( ) 6 15 38 65 106 ( ) ( )
- 7. 0,4,16,40,80,( ) A.160 B.128 C.136 D.140
- 8. 1; 2,12,36,80,()2; 1,3,4,1,9,()3; 0,4,16,40,80,()
- 9. Find the rule, fill in 1 / 2, 0.2, 2.5, 0.4, 4 1 / 2, 3 / 5, (), 80% 1 / 2 (this is half), 0.2, 2.5, 0.4, 4 1 / 2 (this is four and half), 3 / 5 (three fifths), (), 80% Please explain why
- 10. What do you fill in: 20%, 0.4%, 80%, 15 / 3, 5 / 16, 640%, 12.8, ()?
- 11. Find the rule: 1.5, 4.5, 13.5, (), 121.5 1,5,9,13,…… The tenth number is ()
- 12. Find the rules P1, 4, 13, 40, 121
- 13. Four out of nine, two out of nine, one out of nine, (), one out of 36, () find the law
- 14. Find the rule: 4 out of 9, 2 out of 9, 1 out of 9, (), 1 out of 36, (), ()
- 15. Given that a, B, C, D, e and F are six mutually unequal integers and a × B × C × D × e × f = 36, then a + B + C + D + e + F = ()
- 16. If the product of six integers a * b * c * D * e * f = 36, a, B, C, D, e and F are not equal to each other, then a + B + C + D + e + F = () a, 0 B, 4 C, 6 D and 8 are solved
- 17. The voltage of sinusoidal current for lighting is 220 V, what are its effective value and peak value?
- 18. A batch of fruits are transported from the fruit shop. The weight of apples is 21 kg less than 3 times that of pears. The weight of apples is 49 kg more than 2 times that of pears. How many kg are the pears and apples transported?
- 19. A large truck drives from city a to city B at 80km per hour. Half an hour after departure, a car chases the truck at 90km per hour. How many hours after departure can the car catch up with the truck?
- 20. It takes two hours for a small car to go from land a to land B, and four hours for a large car to go from land B to land a. the two cars face each other from 8:30 at the same time