The fourth and the seventh term of Ap. are
17 and 23 respectively. Find a15
Answers
Answered by
1
Answer:
Difference between 7 and 4 is 3
and difference between 23 and 17 is 6
Therefore d= 6/3
d= 2
a= 17-6
= 11
a15 = 11+(14)2
= 11+28
= 39
Therefore, 15th term is 39
Answered by
0
Answer:
a15 = 39
Step-by-step explanation:
nth term of A. P is an = a + (n - 1)d
a4 = 17 => a + 3d = 17 ..... (1)
a7 = 23 => a + 6d = 23 ..... (2)
(2) - (1) => 3d = 6
d = 2
Substituting in (1),
a + 3(2) = 17
a = 11
a15 = a + 14d
= 11 + 14(2)
= 39
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