Given 17,20,23 are in ap find 12 term and sum of 12 term
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Answer:
a = 17
d = 3
12th term = a + 11d
= 17 + 11 (3)
= 50
sum = n/2 [ 2a + ( n-1 )]
= 12/2 [ 2×17 + ( 12-1)]
= 270
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