Question

writhe the first term a1 and the common difference d :
1. 0.3, 0.55, 0.8, 1.05,
2. 1/2, 3/5 , 5/5, 7/5
​

Answer 1

1. a1= 0.3 and d = a2-a1= 0.55-0.30 = 0.25

2. a1= 1 /5 d = a2-a1= 3/5 - 1/5 = 2/5