Question

which term of the AP : 19, 91/5, 92/5 is the first negative term ..??

Answer 1

AP terms are

     92/5, 91/5,  90/5,  89/5, ,.....2/5, 1/5, 0/5, -1/5
 
  as the common difference is -1/5.

It is easy to know the term that is first negative term is :  94th term,  and it is -1/5