12 basic Functions

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Absolute Value Function

f(x) = |x| D: all real R: [0, infinity)

Reciprocal or Rational Function

f(x)= 1/x D: (-infinity, 0) U (0, infinity) R: (-infinity, 0) U (0, infinity)

Cosine Function

f(x)= cos(x) D: all real R: [-1, 1]

Exponential Function

f(x)= e^x D: all real R: (0, infinity)

Greatest Integer Function

f(x)= int(x) D: all real R: all integers

Logarithmic function

f(x)= lnx D: (0, infinity) R: all real

Sine Function

f(x)= sin(x) D: all real R: [-1, 1]

Identity function

f(x)= x D: all real R: all real

Squaring Function

f(x)= x^2 D: all real R: [0, infinity)

Cubing Function

f(x)= x^3 D: all real R: all real

Square Root Function

f(x)=√x D: [0, infinity) R: [0, infinity)

Logistic Function

f(x0= 1/ 1+e^-x D: all real R: (0, 1)


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