Question

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:

8. (a) 9. It is because in the sequence there is only odd numbers. So after 7, 9 comes.

(b) 9.  It is because in the sequence there is only odd numbers. So after 7, 9 comes.

(c) 9

  -----. It is because in the sequence there is only odd numbers/n. So after 7/n,            

    n      9/n comes.

(d) 9/2020

Answer 2

Answer:

a)25

b)n$2$

c)n

d)2020