Asked by Benedicta
The 9th term of an A.P is three times the 5th term. Is it true or false that the 8th term is five times the 4th term.
Answers
Answered by
oobleck
a+8d = 3(a+4d)
a+8d = 3a+12d
-2a = 4d
a = -2d
so, is
a+7d = 5(a+3d) ?
Substitute from the first equation and find out.
a+8d = 3a+12d
-2a = 4d
a = -2d
so, is
a+7d = 5(a+3d) ?
Substitute from the first equation and find out.
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