Question

1;3;5;7......to100 terms ,200 terms find the sum of arithmetic series ​

Answer 1

Step-by-step explanation:

1,3,5,7,.... are in ap

difference = 3 - 1 = 2

arithmetic mean = n/2(2a + (n - 1)d)

for 200 terms,

200/2(2(1) + 199(2))

= 100( 2 + 398 )

= 100(400)

= 40000

for 100 terms

arithmetic mean = n/2(2a + (n - 1)d)

= 100/2(2(1) + (99)2)

= 50(2 + 198 )

= 50(200)

= 10000

Hope this is helpful to you