Question

which term of an ap 25 ,20,15
................ is its first negative term

Answer 1

Answer:

Step-by-step explanation:

Answer 2

a=25
d=-5
n=?
an=0

an=a+(n-1)d
=>0=25+(n-1)-5
=>0=25-5n+5
=>5n=30
=>n=6


hence,6th term of this A.P. is 0.
so.7th term is it's first negative term.