# What are the symbols for sum, difference, product, and quotient?

What are the symbols for sum, difference, product, and quotient?
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habbocowji
Well, there are simple symbols, such as $a+b$, $a-b$, $a×b$, $a÷b$
But, there are also other symbols
For example, there is a symbol for difference used in some equations $\mathrm{△}y$. For instance $\frac{\mathrm{△}x}{\mathrm{△}y}$ is the same as $\frac{{x}_{2}-{x}_{1}}{{y}_{2}-{x}_{1}}$
There is also a symbol for sum $\sum _{n=0}^{10}n$
This is the symbol for summing a function of n denoted as a capital sigma. The bottom number denoted as n is the starting number. The top number is the ending number. You then plug in n for each number up to 10 and add them up.
$\prod _{n=1}^{10}n$ is the symbol for product denoted as a capital pi. In this case, you have the same rules for summing apply to products, but you multiply instead of add.

Dabanka4v
There are simple ones: