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Sticky Note
If the first term of an arithmetic progression is 7 and the common difference is 5, find the 15th term?
  1. 75
  2. 77
  3. 79
  4. None of these
Explanation

Formula for nth term in AP: 

Tn = a + (n-1)_d

Where 

a = first term = 7

d = common difference = 5

n = 15

Put values:

T15 = 7 + (15-1)_5

T15 = 7 + 14*5

T15 = 7 + 70

T15 = 77


Last verified on 02-08-2026

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