Question

the sum of 4th and 6th term is zero and product of 6th and 9th term is 36 prove that fifth term is zero

Answer 1

hlw dear...
a+3d+a+5d=0 (as per que..)
2a+8d=0..
8d= -2a..
a=8d/-2..
a= -4d..
t(5)= a+4d
put a= -4d..then
-4d+4d=0...