Asked by cliff
the first term of an arithmetic progression is-4 and 15th term is double the 5th term. find the 12th term.
Answers
Answered by
Damon
search for Math is Fun arithmetic sequence
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Answered by
Writeacher
https://www.mathsisfun.com/algebra/sequences-sums-arithmetic.html
(Damon, contact Leo.)
(Damon, contact Leo.)
Answered by
Damon
https://www.mathsisfun.com/algebra/sequences-sums-arithmetic.html
Yes! Working now, thanks :)
Yes! Working now, thanks :)
Answered by
Writeacher
Yayyy! =)
Answered by
kumar
Given F1= -4
So F15= F1+14d=-4+14d=2[F1+4d]=2F1+8d
-4+14d=2*-4+8d=-8+8d
14d-8d=-8+4
6d=-4 d=-4/6=-2/3
F12=F1+11d=-4+11*2/3=-4+22/3=-12+22/3=10/3=3 1/3
So F15= F1+14d=-4+14d=2[F1+4d]=2F1+8d
-4+14d=2*-4+8d=-8+8d
14d-8d=-8+4
6d=-4 d=-4/6=-2/3
F12=F1+11d=-4+11*2/3=-4+22/3=-12+22/3=10/3=3 1/3
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