Find an ap whose fourth term is 9 and the sum of its sixth term and thirteen term is 49
Answers
Answered by
0
Answer: 6/11 , 37/11 , 68/11 , .............
Step-by-step explanation:
a + 3d = 9 ⇒ a = 9-3d
a + 5d + a + 12d = 49
= 2a + 17d = 49
= 2(9-3d) + 17d = 49
= 18 - 6d + 17d = 49
= 11d = 31
= d = 31/11
a = 9 - 93/11 = 6/11
AP = 6/11 , 37/11 , 68/11 , .............
Similar questions