Question

find the nth term of an AP 13,8,3,3,-2

Answer 1

here the common difference is -5 so
an=2a+(n-1)d
2×13+(n-1)-5
26-5n+5
31-5n this is nth term

Answer 2

Here the common difference d=-5 since the difference b/w every consecutive term is -5. nth term of an AP is Fn=F1 +(n-1)d here the first term F1=13. i.e,Fn=13+(n-1)×(-5) i.e,Fn=13+(-5n)+5 i.e,Fn=18-5n Fn=18-5n is the nth term of the AP. HOPE IT HELPS......