Question

PLEASE HELP I RLLY DONT KNOW WHAT TO DO

For the function f(x) = 2x - 9, find the following
a. f(0)
b. f(2)
c. f(-3)
d. f(1/2)

Answer 1

a) f(0) = -9

b) f(2) = -5

c) f(-3) = -15

d) f(1/2)=-8

Explanation:

We are given the function
`f(x)=2x-9` and we need to find the following:

a) f(0)

For finding f(0) put x =0 in the given function

`f(x)=2x-9\\Put\:x=0\\f(0)=2(0)-9\\f(0)=-9`

So, we get f(0)=-9

b) f(2)

For finding f(2) put x =2 in the given function

`f(x)=2x-9\\Put\:x=2\\f(2)=2(2)-9\\f(2)=4-9\\f(2)=-5`

So, we get f(2)=-5

c) f(-3)

For finding f(-3) put x =-3 in the given function

`f(x)=2x-9\\Put\:x=-3\\f(-3)=2(-3)-9\\f(-3)=-6-9\\f(-3)=-15`

So, we get f(-3)=-15

d) f(1/2)

For finding f(1/2) put x =1/2 in the given function

`f(x)=2x-9\\Put\:x=(1)/(2)\\f((1)/(2))=2((1)/(2))-9\\f((1)/(2))=1-9\\f((1)/(2))=-8`

So, we get f(1/2)=-8