Question

Write the use of left $ and sgn $ function.






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Answer 1

Answer:

$ this is a dollar sign.

Answer 2

Symbol Symbol Name Meaning / definition

x! exclamation mark factorial

| x | vertical bars absolute value

f (x) function of x maps values of x to f(x)

(f ∘ g) function composition (f ∘ g) (x) = f (g(x))