Question 1184345
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When n arithmetic means are inserted between a and b, b is equal to a plus (n+1) times the common difference.  So in this problem<br>
36 = 3+(7+1)d
36 = 3+8d
8d=33
d=33/8 or 4 1/8<br>
The sequence is<br>
3, 7 1/8, 11 1/4, ..., 31 7/8, 36<br>