Answer:
f(-4)=3(-4)-8
f(-4)=-12-8
f(-4)=-20
f(2)=3(2)-8
f(2)=6-8
f(2)=-2
f(7)=3(7)-8
f(7)=21-8
f(7)=13
R=(-20, -2, 13)
The range of the function when f(x) = 3x - 8 and the domain is {-4, 2, 7) is (-20, -2, 13).
Since
f(-4)=3(-4)-8
f(-4)=-12-8
f(-4)=-20
Now
f(2)=3(2)-8
f(2)=6-8
f(2)=-2
Now
f(7)=3(7)-8
f(7)=21-8
f(7)=13
So,
R=(-20, -2, 13)
hence, The range of the function when f(x) = 3x - 8 and the domain is {-4, 2, 7) is (-20, -2, 13).
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