Question

Given this arithmetic sequence, find d 4,_,_,_,_,179

Answer 1

4 + (6-1)d = 179 
4 + 5d = 179 
5d = 175 
d = 35

Answer 2

$a_1=4 \\ a_6=179 \\ \\ d= \frac{179-4}{6-1}= \frac{175}{5}=35$

The answer is d=35