Pencils cost 25p each. Mr smith spends £15 on pencils. Work out the number of pencils he gets.
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The domain and inverse of the function
is
Domain = ,
What is a function?
A function from A to B is a rule that assigns to each element of A a unique element of B. A is called the domain of the function and B is called the codomain of the function.
There are different operations on functions like addition, subtraction, multiplication, division and composition of functions.
The given function is
r(x) is not defined if x - 4 = 0
r(x) is not defined for x = 4
Domain = ,
Where is the set of all real number
Let r(x) = y
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