Question

find 100th term of the following A.P. 9,4,-1,-6,-11,...

Answer 1

Hey mate yhank for the question
Hope it helps
a=9
d=a2-a1=4-9=-5
d= -5
a100=a+(n-1)d
a100=9+(100-1)*-5
a100=9+99*-5
a100=9-495
a100=-486

Answer 2

Answer:

Step-by-step explanation:

nth term of AP is a+(n-1)d, where a is first term and d is common difference.

So,here

a=9,

d=4-9= -5

Hence,100th term is 9+(100-1)*(-5)

=9-495=-486

Hope you understood