The 5th term of an A.P is 3times the first.find the sum of the first 8 term of progression.given that 1/4 of 5th termis9

Answer 1

3 a = a + d(4) or 2a = 4d or a = 2d

fifth term is
a + 4 d
which is 3 a of course
(1/4)(3a) = 9
3 a = 4*9
a = 12
so d = 6
12, 18 , 24 ....
you can find the sum of first 8 I am sure

Answer 2

I have not seen the answer to my question