If the first term of an arithmetic progression is 7 and the common difference is 5, find the 15th term?
- 75
- 77
- 79
- 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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