Question

please..... help me........


8) What is the sum of the first 5 terms of arithmetic

sequence 1,3,5,7...?

b)What is the sum of the first n terms of the arithmetic

sequence 1,3,5,7.....?

c)Find the sum of the first n terms of the arithmetic sequence

1/n,3/n,5/n,7/n....?

d)What is the sum of the first 2020 terms of the arithmetic

sequence 1/2020,3/2020,5/2020,7/2020......?​

Answer 1

Answer:

you can calculate your self

Answer 2

Answer:

8)25

b) n/2[2+(n-1)2]