12, 19, 26, 33 ...
7, -18, -43, -68 ...
30, -5, -40, -75 ...
26, 76, 126, 176 ...
a1=28, d=10
First 5 terms:
a1= -38, d= -100
First 5 terms:
a1 = 8, d = 4
Frist 5 terms:
a1 = 18, d = -3
a1=39, d= -5
a1= -26, d= 200
a1 = 25, d = 5
a1 = 15, d = -10
Given two terms in an arithmetic sequence find the common difference.
Hint: slope! Use the n-value as x and the output as y.
a18=3362 and a38=7362