Asked by Mukhtar Intisar
The 5th term of an AP is 9 and the 8th is 27 find the 13th term
Answers
Answered by
Anonymous
Tn = a + (n-1) d
T5 = a + 4 d = 9
T8 = a + 7 d = 27
----------------------- subtract
-3 d = -18
d = 6
a + 4*6 = 9
a = -15
T13 = -15 + 12*6 = -15 + 72 = 57
T5 = a + 4 d = 9
T8 = a + 7 d = 27
----------------------- subtract
-3 d = -18
d = 6
a + 4*6 = 9
a = -15
T13 = -15 + 12*6 = -15 + 72 = 57
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