Question

if the ratio between 5th and 10th terms of an AP is 1:2 and 12th term is 36,find that AP

Answer 1

Hi Mate!!!

required a.p is a , a +d , a + 2d , a + 3d ,...

5th term = a + 4d

10th term = a + 9d

where a ist term and d is common difference.

a + 4d / a + 9d = 1 / 2

=>. 2a + 8d = a + 9d

=>. a = d

12th term = a + 11d = 36

12d = 36

d = 3

so, a =3

so, a.p is

3 , 6 ,9 , 12,...


Have a nice day ahead.

Answer 2

hey friend!
please find your answer in the attactchment
hope this helps
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