The function is applicable within the segments of x:
(-∞, -1) and [-1, 7), meaning it is valid for x < 7.
Importantly,
the function cannot be evaluated at x = -1 in the left part of the linear graph, while it is valid at x = -1 in the right segment of the same line. Additionally, the function is not defined at x = 7 or any value above it.
Conclusion: x < 7.
<span>The set of the sequence includes all natural numbers
</span><span>The 4th term in the sequence equals 9
</span><span> The point (4, 9) appears on the sequence's graph.</span>
