Have you Learnt the Algebraic Symbols?

 

Symbol
Symbol Name
Meaning / definition
Example

x
x variable
unknown value to find
when 2x = 4, then x = 2


equivalence
identical to
 


equal by definition
equal by definition
 

:=
equal by definition
equal by definition
 

~
approximately equal
weak approximation
11 ~ 10


approximately equal
approximation
sin(0.01) ≈ 0.01


proportional to
proportional to
y ∝ x when y = kx, k constant


lemniscate
infinity symbol
 


much less than
much less than
1 ≪ 1000000


much greater than
much greater than
1000000 ≫ 1

( )
parentheses
calculate expression inside first
2 * (3+5) = 16

brackets
calculate expression inside […]

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