Is the nth term in the sequence equal to the general term formula of the sequence?
Here n is just a code. Of course, the n-th term can be used to represent the general term. When it can be the m-th term, the k-th term and so on, it can also be represented by the n-1, M-1, K + 1 and so on
How much is 1 to 30? It's better to tell me a formula
(1+30)*30/2
=930/2
=465
Write a subtraction formula according to 8.27-3.56 = 4.71, fast
How do you write it?
8.27-4.71=3.56