How to determine if a relation is a function? | Relations and Functions | Mathematics | Khan Academy

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In this video, we will learn which relations are called functions.

00:00 What is a relation?
00:53 Conditions to be satisfied by a function
01:53 Solved examples on determining if a relation (visual) is a function
05:32 Identifying if a relation (in roster form) is a function

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Aakash Singh Bagga
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Lekin sir agar pre image wale set me 2 aur negative 2 hoga aur Image wala set me 4 hoga toh valid hai

adityamukherjee