The 8th term
the common
of an Ap is 17 and 19th term is 39. Find common
difference?
Answers
Answered by
7
Answer:
d=2
Step-by-step explanation:
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Answered by
2
Hi...☺
Here is your answer...✌
GIVEN THAT,
T8 = 17 and T19 = 39
T8 = 17
a + 7d = 17
a = 17 - 7d -----(1)
and
T19 = 39
a + 18d = 39
17 - 7d + 18d = 39 ___ [ from (1) ]
11d = 39-17 = 22
d = 22/11
d = 2
Putting d = 2 in eq(1)
we get
a = 17 - 7(2) = 17 - 14
a = 3
Now,
T25 = a + 24d
= 3 + 24×2 = 3 + 48
= 51
HENCE,
25th term of Given AP is 51
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