1, triangle

2. The discriminant formula of quadratic function roots.

3, said the increment of variables, such as △ x, △ y. ..

4. Represents a small amount.

Precautions for expanding data:

Pronunciation of the fourth Greek letter of δ, uppercase δ, lowercase δ. In mathematics or physics, the capitalized δ is used to represent the incremental symbol. And lowercase δ is usually used to represent variables or symbols in higher mathematics.

Delta symbol is widely used in life, and many brands and institutions are named after it. Pronunciation delta /de:lta/ Delta is a unit to measure the changes in futures prices and the extent of changes in equity fees.