Question

Find the range of the function for the given domainf(x) = 2x+5; (-2, -1, 0, 1, 2)

Answer 1

To find the range of the function f(x) = 2x + 5 with domain {-2, -1,0, 1, 2 we need to evaluate the function in this points so

`\begin{gathered} f(-2)=2(-2)+5=-4+5=1 \\ f(-1)=2(-1)+5=-2+5=3 \\ f(0)=2(0)+5=0+5=5 \\ f(1)=2(1)+5=2+5=7 \\ f(2)=2(2)+5=4+5=9 \end{gathered}`

The range is

`\lbrace1,3,5,7,9\rbrace`