On the order of magnitude T (n) = O (f (n)), O denotes the concept of order of magnitude If t (n) = 1 / 2n (n-1), then the order of magnitude of 1 / 2n (n-1) is the same as that of n ^ 2, so t (n) = O (n ^ 2) Then the following sentence does not understand why it will be the same? 1 / 2n ^ 2-1 / 2n is the same as n ^ 2?

On the order of magnitude T (n) = O (f (n)), O denotes the concept of order of magnitude If t (n) = 1 / 2n (n-1), then the order of magnitude of 1 / 2n (n-1) is the same as that of n ^ 2, so t (n) = O (n ^ 2) Then the following sentence does not understand why it will be the same? 1 / 2n ^ 2-1 / 2n is the same as n ^ 2?

Take its highest power, the order of magnitude is as follows: 1, log2 (n), N, n * log2 (n), n * n, n * n * N and so on, you just need to find its maximum order of magnitude

What is the maximum unit of magnitude

Multiples and fractions
Yox09 (x0924)
10 ^ 21 (it)
10 ^ 18
10 ^ 15 (it)
10 ^ 12
10 ^ 9
10 ^ 6
10 ^ 3
10 ^ 2
10 ^ 1
10 ^ - 1
10 ^ - 2
10 ^ - 3
10 ^ - 6
10 ^ - 9
10 ^ - 12
10 ^ - 15
10 ^ - 18
10 ^ - 21 (Putuo)
10 ^ - 24 (Coto)

What order of magnitude is μ m?
For example, what is the relationship between 1 μ m and 1cm?

μ m is a smaller unit of length, that is, micron (1 / 1000 of millimeter), so 1cm = 10000 μ m, the common 1m = 10dm = 100cm = 1000mm, and the smaller unit of length is nanometer (1 / 1000 of micron) or even angstrom (1nm = 10 Angstrom)