Find the sum of the first 200terms of A.P whose first term is 7and 200ťh term is 393 ?
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Answer:
400,00
Step-by-step explanation:
a = 7 ,
Tn = a + (n-1)d
T200 = 393
T200 = 7 + (199)d = 393
(199)d = 386
S = n/2[2a+(n-1)d]
S = 100[14 + 199d]
= 100[14+386]
= 100*400
= 400,00
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