This is not true for infinite set
Rationalised 2023-24
RELATIONS AND FUNCTIONS
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—v
v
v
v
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Historical Note
The concept of function has evolved over a long period of time starting from
R Descartes (1596-1650), who used the word ‘function’ in his manuscript
“Geometrie” in 1637 to mean some positive integral power xn of a variable x
while studying geometrical curves like hyperbola, parabola and ellipse James
Gregory (1636-1675) in his work “ Vera Circuli et Hyperbolae Quadratura”
(1667) considered function as a quantity obtained from other quantities by
successive use of algebraic operations or by any other operations Later G