Relations - CBSE Important questions - Class 12 chapter 1
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Functions CBSE Important questions - Class 12 maths Relations and Functions
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What are Functions ? - Class 12 maths chapter 1 - Relations and Functions
WHAT ARE FUNCTIONS? So in the previous post, we learnt about “ RELATIONS”. If you missed those posts kindly follow the link, as it is pre requisite knowledge to study functions. CLICK THIS LINK WHAT ARE RELATIONS? Dear friends “ FUNCTIONS” are special type of “RELATIONS” In a Relation we associate elements of set “A” (DOMAIN) with the elements of set “B” ( CO DOMAIN) following a fixed rule. R = { (0,0), ( 1, -1) , (1, 1) , ( 4, -2) , ( 4, 2) , ( 9, -3) , ( 9, 3) } See how 1 associated with -1 and 1 in red colour. 4 with -2 and 2 in blue and 9 with -3 and 3 in green. R = { (0,0), (-1,1), (1,1), (-2,4) , ( 2,4), ( -3,9) , ( 3,9), ( -4,16), (4,16) } See how -1 and 1 are associated with 1 in yellow colour -2 and 2 with 4 in green ; -3 and 3 with 9 in red and -4 and 4 with 16 in black Now, we’ll take just one more example and then we can understand what functions are See how each -2 is connected with -1 only, -1 with 0 ...
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