Answer:
5.5, 7, 8.5
Step-by-step explanation:
Find the mean of 4 and 10, that is
[tex]\frac{4+10}{2}[/tex] = [tex]\frac{14}{2}[/tex] = 7
Now repeat with 4 and 7 and 7 and 10
[tex]\frac{4+7}{2}[/tex] = [tex]\frac{11}{2}[/tex] = 5.5
[tex]\frac{7+10}{2}[/tex] = [tex]\frac{17}{2}[/tex] = 8.5
Hence
4, 5.5, 7, 8.5, 10 ← is an arithmetic sequence with d = 1.5
