In the following regular sequence, the nth number is (). 1, 4, 9, 16, 25

The nth number is n ^ 2

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1. Find sequence 1, 2, 4, 7, 11, 16 The general term formula of
2. A general term of sequence 1,2,4,7,11
3. There is a sequence: 1,2,2,4,3,8,4,16,5... Then its 100th term is
4. Seeking sequence: 1, 3 / 4, 5 / 8 What is item 100 of If you find the sequence: 1, 3 / 4, 5 / 8, 13 / 24 What's item 100?
5. Known sequence: 1, (1 + 1 / 2), (1 + 1 / 2 + 1 / 4), (1 + 1 / 2 + 1 / 4 + 1 / 8) （1+1/2+1/4+…… 1 / {2 Λ n – 1}). Find the sum of its first n terms
6. There is a sequence: 1 / 1,2 / 1,1 / 2,3 / 1,2 / 2,1 / 3,4 / 1,3 / 2,2 / 3,1 / 4 What is the column 7 / 19?
7. Is the sum of the first n items of sequence 1 - A ^ 2 - A ^ 3? Sequence 1 - A ^ 2 - A ^ 3 What is the sum of the first n items?
8. Sequence 1 / 1,1 / 2,2 / 1,1 / 3,2 / 2,3 / 1,1 / 4,2 / 3,2 / 3,4 / 1 Item 2003 The teacher's answer is 50 / 14. I made 50 / 13 myself. Please come and see how much it is,
9. Sequence 1. - 2,3, - 4 ,99,-100,… What are the top 200 items and?
10. In the sequence 1 / 2,1 / 3,2 / 3,1 / 4,2 / 4,3 / 4,1 / 5 What is 78 / 99? Find the sum of the first 100 items
11. There is a sequence 1 - 2 - 3 4 - 5 - 6 7 - 8 - 9 10 - 11 - 12 13?
12. At 1, 4, 9, 16, 25 What is the nth number in the regular sequence
13. 1,3 / 6,3 / 4,7 / 10,2 / 3,9 / 14,
14. I would like to ask prawn: for the sequence 1,2,4,7,11,16,22,29 --- how to find the sum of the first n terms?
15. Sequence 1,3,4,7,1,8,9,7, (). 3.9... What are the rules of this sequence
16. What are the rules of the arrangement of the series 1,1,1,3,1,5,1,7
17. Existing sequence: 8,1,6,4,3,7,0,1,3. What is their regular arrangement? This is an independent recruitment test. I hope you can give some reliable answers
18. Five sixth grade math problems, help It's all about cylinders 1. Diameter = 8 cm, height = 4 cm, find the surface area of the cylinder 2. Radius = 5cm, height = 25cm, find the surface area of the cylinder 3. Perimeter = 62.8 cm, height = 4 cm, find the surface area of the cylinder 4. The side view of a cylinder is square, and the diameter of its bottom is 6cm 5. The side area of a cylinder is 251.2 square centimeters, and the height is 10 centimeters. What is the radius of its bottom? What is the bottom area? Brothers and sisters, aunts and aunts, aunts and uncles, help me!
19. 1. Arrange the natural numbers as shown in the figure below. In this arrangement, the number 9 is in the third place and the second column? 1 2 4 7 11 16... 3 5 8 12 17... 6 9 13 18... 10 14 19... 15 20... 21... ... 2. There is a new operation *, which is defined as 1 2 x＊y=---+ ----------- x+y （x=1)(y+a) one Known 5 * 2=--- 9, 3 * 2 3. # denotes a new operation symbol. It is known that 2 # 3 = 2 + 3 + 4, 6 # 2 = 6 + 7, 3 # 5 = 3 + 4 + 5 + 6 + 7. According to this rule, n # 8 = 228, what is n? 4. For any two natural numbers a and B, a # B = a (a + 1) (a + 2). (a + B-1), if (x # 3) # 2 = 3660, find X 5. Let m and n be natural numbers, am denote the sum of the digits of M, an denote the sum of the digits of N, and m * n denote the remainder of M divided by N. given that the sum of M and N is 8088, find the value of (am + an) * 9 You can answer as many questions as you can
20. After the true fraction A7 is changed into a decimal, if the sum of several consecutive digits from the first digit after the decimal point is 1992=______ ．