Mathematical sequence problems in Senior Two A unicellular animal reproduces in half and splits every two minutes. Suppose one such cell is placed in a container containing nutrient solution for exactly one hour. If two such cells are placed in the container at the beginning, it will take minutes to fill the container To solve the inequality (2x-6) / (2x ^ 2-5x + 2) ≤ 3, let's look at this problem again, although it is not a sequence

Mathematical sequence problems in Senior Two A unicellular animal reproduces in half and splits every two minutes. Suppose one such cell is placed in a container containing nutrient solution for exactly one hour. If two such cells are placed in the container at the beginning, it will take minutes to fill the container To solve the inequality (2x-6) / (2x ^ 2-5x + 2) ≤ 3, let's look at this problem again, although it is not a sequence

1. A unicellular animal reproduces in a way of splitting into two, dividing once every two minutes. A single cell will have two in two minutes, so 60-2 = 58 (minutes) will take 58 minutes to fill the container. 2. To solve the inequality (2x-6) / (2x ^ 2-5x + 2) ≤ 3 (2x-6) / (2x ^ 2-5x + 2) - 3 ≤ 0 (6x ^ 2-17x + 12) / (2x ^ 2 -

It is known that the sum of the first n terms of {an} is SN
And Sn = 1 / 2ana (n + 1) (n belongs to n *), where a1 = 1, find the general term formula of sequence {an}

Ana (n + 1) on the molecule
If yes
S1=A1=1=1/2(A1A2)=1/2(A2)
A2=2
S(n+1)=Sn+A(n+1)=1/2(AnA(n+1))+A(n+1)=1/2(A(n+1)A(n+2))
That is, a (n + 2) = an + 2
S(n-1)=Sn-A(n)=1/2(AnA(n+1))-An=1/2(A(n-1)An)
That is, a (n + 1) = a (n-1) + 2
It is concluded that the odd and even terms of an are sequences with tolerance of 2, and the first terms are 1 and 2 respectively
That is, a (2n-1) = 2N-1, a (2n) = 2n, where n = 1,2
Obviously, the two sequences can be unified as an = n, where n = 1,2

General term formula in arithmetic sequence
There are some things I don't understand when learning arithmetic sequence. The number sequence of shoe size is 21,21 and half, 22,22 and half, 23,23 and half, 24,24 and half... I think it should be one by one, but the book says that the difference between each item and the previous item is equal to half. I'm surprised, and who can tell me what the general term formula of this shoe size sequence is

Arithmetic sequence an = 20.5 + 0.5N