Question

Find the domain and range of:
a. (1,2),(2,-4),(3,-10),(4,-16)

Domain {1,2,3,4}
Range {2,-4,-10, 16}

can someone show full work for how this is found?

Answer 1

Domain {1,2,3,4}
Range {2,-4,-10, 16}
Please ask me if you did not get it?

Answer 2

the domain is the set offirst values in the brackets
and the range the set of second values

Answer 3

yw

Answer 4

the domain i the possible values of x
which is the set of all real numbers
range is the same

Answer 5

the range is all possible values of f(x)

Answer 6

ok?

Answer 7

the inverse function of (a) is found by reversing each pair of numbers
that is (2,1), etc

Answer 8

so domain is {2,-4,-10,-16}
and range is {1,2,3,4}

Answer 9

(b) to find inverse make x the subject of the formula
f(x) = 3x - 1
3x = f(x) + 1
x = (f(x) + 1) / 3
now replace f(x) by x

inverse = f-1(x) = (x + 1) / 3

Answer 10

domain of the inverse is all real numbers
range is all real numbers

Answer 11

:) is that a smile?

yw

Answer 12

btw where do i get a list of these symbols?