Question

What does $\cup$ mean in the Math domain?

Answer 1

Meaning of $\cup$:

• The symbol $\cup$is used to combine all the intervals.
• The symbol $\cup$is read as "union".
• If there is a function $f\left(x\right)$ whose domain is defined for the intervals $\left[a,b\right]$ and $\left[c,d\right]$ i.e, the domain can be any values in between $a$and $b$and also $c$and $d,$ then the combined interval can be written as $x\in \left[a,b\right]\cup \left[c,d\right]$.

Hence the meaning of $\cup$is explained.