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Find the rule and fill in 2,3,5,7,9, ()
It's 11
2*1+1=3
2*2+1=5
2*3+1=7
2*4+1=9
2*5+1=11
Find the rule "0.1.3.9.24.55. ()" and find the number in brackets
Higher order arithmetic sequence, in order to find out the law, respectively find out the first order, second order After finding the law, we can deduce it
Original sequence: 0 1 3 9 24 55 (111)
First order difference: 1 2 6 15 31 (56)
Second order difference: 1 49 16 (25)
Third order difference: 3.57 (9)
Fourth order difference: 2
Number in brackets: 111
1, 3, 9, 27, ()
1,3,9,27,( 81)
Rule: the nth number is the (n-1) power of 3
Find the rule: 1,2,3,2,4,9,3,6,27,4, (), ()
I think it's 8, 81 + 1, + 2, multiply by 3
For reference only
Find the rule: 1, 4, 9, 16 () ()
25.36
Find the rule 1, 1 in 4, 1 in 9, 1 in 16 () ()
1, 1 in 4, 1 in 9, 1 in 16, (1 in 25), (1 in 36)
Find the rule and fill in 0,3,8,15,24
35, add 3, 5, 7, 9, 11 in turn
The first line 1, the second line 23 4, the third line 56 7 8 9, the fourth line 10 11 12 13 14 15 16. How many lines should 2005 be in
The first line has one, the second line has two more than the first line, the third line has two more than the second line, each line has two more numbers than the previous line, and so on
If you go on like this, there are 29 numbers in line 20, which add up to 1 + 3 + 5 + +29 = 400, then 400 - the number of all the numbers in line 29 (not sum) 39 plus 5 equals 366
Are you satisfied with the above answers?
The first line: 1, the second line: 1 / 2, 1 / 2, the third line: 1 / 3, 1 / 6, 1 / 3, the fourth line: 1 / 4, 1 / 12, 1 / 12, 1 / 4, the fifth line: 1 / 5, 1 / 20, 1 / 30, 1 / 20, 1 / 5
All the numbers in line 11. Quick
1/11,1/110,1/495,1/1320,1/2310,1/2772,1/2310,1/13201/495,1/110,1/11
What number should be filled in the blank? The first line is 24 15 blank, the second line is three number blank, the third line is 45 36 blank, the horizontal, vertical and oblique sum is 90,
The question is wrong
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