Mathematics
The first term of an A.P. is 7 and its 13th term is 35. The common difference of the A.P. is :
AP
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Answer
Given,
a = 7
⇒ a13 = 35
⇒ a + (13 - 1)d = 35
⇒ 7 + 12d = 35
⇒ 12d = 35 - 7
⇒ 12d = 28
⇒ d =
⇒ d = .
Hence, option 4 is the correct option.
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