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
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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:
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