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## Homework Statement

Please refer to the image attached. The first part, (i).

## Homework Equations

None.

## The Attempt at a Solution

My answer is 0 </= x </= 4, but the answer says 0<x<4.

Why are 0 and 4 not included?

Since the domain includes 6, then 0.5(6)+1 =4, 4 should be included right?