find the the sum of 102 , 97, 92,...... up to 27 terms
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7
Answer:
a = 102
d = 97 - 102
= -5
n = 27
Sum = 27/2[2 X 102(27-1)-5]
= 27/2 (204 X 26-5)
= 27/2 (204 X 21)
= 27/2 (4284)
= 57834
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