Usage: add and subtract to find the initial value and final value of the product. For example, you can write "i= 1" under the symbol and "n" above the symbol, which means that I in the following quadrature formula is added to n from 1. That is, (1+d1/p1) (1+d2/p2) ... (1+dn/pn).
∏ is the Greek letter, that is, the capital form of π, which mathematically means quadrature operation or direct product operation, and is similar to σ in form.
Commonly used mathematical symbols:
1、∫?
Indefinite integral.
2、∮
Closed surface integral.
3、 ∝?
Infinitely small.
4、∞?
Infinite.
5、∨?
A collection of symbols.
6、∧?
Symbol collection, payment.
7、∑?
Sum symbol, continuous addition.
8、∏?
Orthogonal symbols, multiplication.
9、∪
Logical symbols and.
10、 ≌?
suit