Question

If the 10 term of an ap is 1/20 and its 20 terms is 1/10 , then the sum of its first 200 terms is

Answer 1

Answer:

Given,

a+9d = 1/20

a+19d = 1/10

using elimination method,

d = 1/200

a = 1/200

sum of first 200 terms = S =n/2{2a + (n-1)d}

201/2

Step-by-step explanation: