Class 10 – Functions

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Topic Sub Topic Online Practice Test
Functions
  • Introduction to functions & Composite functions
  • Introduction to functions
  • Inverse function
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Functions
  • Domain and range
  • Types of functions
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Introduction:Function is an interesting branch of mathematics. It helps in the study of performance of a quantity lender various conditions. Let’s see the difference between function and relation.

Difference between function and relation:

Function

Relation

A function is a “well behaved” relation. It means it satisfies/has a condition to move from Domain to Range.

A relation is just a relationship between sets of information.

Function must use all the elements in its domain.

Relation can have few elements left out in Domain.

Now that we saw the difference between a function and a relation. Let us now gain a knowledge of necessary information regarding fuction.

Types of intervals:Let a, b  R and a<b. Then
1.
is called open interval.

2. is called closed interval.

3. is called left open right closed interval.

4.  is called left closed right open interval.

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