an=a1+(n-1)*d
a8=a1+(8-1)*5
a8=a1+7*5
a8=a1+35
a8-35=a1
a1=a8-35
a1=56-35
a1=21
So this arithmetic sequence is:
21,26,31,36,41,46,51,56
Which one is a rule for the nth term of an arithmetic sequence with a8 = 56 and d = 5?
2 answers
where did u get 56?