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)