Asked by Tsige
The 3rd term of arthmetic sequence is 3/4th of 6th term.and their sum is 60.find a,d and nth term.
Answers
Answered by
Damon
a + 2 d = (3/4)[ a + 5d ]
and
2 a + 7 d = 60
------------------------
(1/4 a -7/4 d = 0
or
1 a - 7 d = 0
2 a + 7 d = 60
------------------- add
3 a = 60
a = 20
d = 20/7
an = 20 + (n-1)(20/7)
and
2 a + 7 d = 60
------------------------
(1/4 a -7/4 d = 0
or
1 a - 7 d = 0
2 a + 7 d = 60
------------------- add
3 a = 60
a = 20
d = 20/7
an = 20 + (n-1)(20/7)
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.