Question

Find the sum of the first 10
terms.
0.5,0.9,1.3,1.7,..

Answer 1

Answer: 23

Explanation:

The first term is 0.5 and the common difference is 0.4.

Using the sum of an arithmetic series formula,

`S_(10)=(10)/(2)[2(0.5)+(10-1)(0.4)]=\boxed{23}`