The first row of 9,7,12,8, the second row of 16,19,20, the third row of 35 spaces, the fourth row of spaces how to find the law
9 7 12 8
16 19 20
35 39
seventy-four
9 + 7 = 16; 7 + 12 = 19; 12 + 8 = 20; and so on
The result of expression 3.5 + 1 / 2 + 56% 10 is
3.5+1/2+56%10
3.5+0+6
nine point five
Who can help write a general formula: 6, 12, 30, 90 4,10,24,
Now I urgently need the general formula of these two sequences. If anyone is willing to help me, he will be very grateful!
6,12,30,90……
an=(n+1)(n+2)
=n²+3n+2
4,10,24,56……
an=(n+3)*2^(n-1)
1+2+3+4+5+.
From [1 + 56] + [2 + 55] + [3 + 54] + [4 + 53]
All I know is that every addition is 57
Then, where does 57 * 28 come from
Then we say divide this number by nine to get the remainder
Why divide the number 1596 into [+ 5 + 9 + 6] / 9
As for why the remainder of 1596 divided by 9 is divided into [1 + 5 + 9 + 6] / 9, 1596 = 1000 + 500 + 90 + 61000 divided by 9, 1500 divided by 9, 5, 90 divided by 9, 0 is actually the remainder of 9, 6 divided by 9, 6, so the remainder of 1596 divided by 9 can be divided into (1 + 5 + 9 +)