Question

which term of a.p. 25,97/4,47/2,91/4....... is first negative term?

Answer 1

a=25

d=97/4-25
=24.25-25
=-0.75

consider 0 as the nth term


0=a+(n-1)d
=25+(n-1)-0.75
-25=-0.75n-0.75
-0.75n=25-0.75
n=24.75÷0.75
n=32.33

as negative comes after 0,
33rd term will be the first negative term

Answer 2

33rd term is the first negative term.