In a sequence described by a function, what does the notation f (3) = 1 mean

Answer with explanation:

If an expression, f (x) = y, is a function, then for every y, there is unique x and for every x, there is unique y.

⇒f (3) = 1, means, when in the expression, x is substituted by, 3, the value of y is 1.

⇒x (Domain) y (Range)

3 1

The Set of values that x can take is called Domain of the function, and the set of values that y can take is called Range of the function.

X = 3

Y = 1

f (3) = 1

X Y