Complex number... though a and b don't have to be integers, and if a = 0 then it's a pure imaginary number.
Rational number
Any rational number.
A rational number.
a rational number
fraction, a ratio of two integers p/q where q is not equal to zero.
ratio of two integers, p/q where q is not equal to zero.
A rational number
rational number
Rational number
Repeating decimal
Any rational number.
A rational number.
an irrational number
It is probably a mixed rational number.
a rational number
a rational number
A rational number