Question 3 Given: A = (1, 5), (2, 8), (7, 19). Find domain D...

Question 3 Given: A = {(1, 5), (2, 8), (7, 19)}. Find domain D and range R. D = {5, 8, 19}, R = {1, 2, 7} D = All real numbers, R = All real numbers D = {1, 2, 7}, R = {5, 8, 19} none of the above

Transcript

00:01 Hello, showings, we are going to write here for this.

00:04 This must be written as in the question we are given the function, so function have, so we are going to write here for this.

00:14 A function have domain, so definitely domain is represented by d here.

00:25 If i write here for this, so let's erase this to make it more clear and, co -domain co -domain c and if i write here range range r so basically if i write here for this this must be written as so domain is all possible so all possible real values of x which we can take input in function and these two our y values so basically if i write here for this we need to write here so basically we can directly say here so basically we need to check first our d option so option d it is incorrect why option d is incorrect because we are given here r is equal to d given so range is set of y values and d is a set of x values so x values can't be equal to y values so definitely this is incorrect so we need to talk about our c part so we can draw a graph or band diagram to show that so basically what is domain domain is the range of x value we are going to write here let's say this is our function and this must be your co -domain.

02:19 So co -domain are the, we are going to write here for this, are possible by values.

02:27 And range is, so what is our range? so range we can get, it is actually given in the question, in which function is possible according to given question.

02:39 So definitely we can write here range lies under the co -domain and it is the subset of co -domain.

02:48 So definitely is r is equal to c.

02:54 So we can see, according to band diagram, it can be equal to c if range is equal to code even but not always...

Question

Question 3 Given: A = {(1, 5), (2, 8), (7, 19)}. Find domain D and range R. D = {5, 8, 19}, R = {1, 2, 7} D = All real numbers, R = All real numbers D = {1, 2, 7}, R = {5, 8, 19} none of the above

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